766 LCGC NORTH AMERICA VOLUME 23 NUMBER 8 AUGUST 2005 www.chromatographyonline.com

EmitterWaters’ NanoEase emitter is designed for

capillary and nanoflow MS applications. The

same emitter can be used at nanoscale or

capillary flows ranging from 100 nL/min to

10 �L/min. The end of the emitter can be

regenerated for continued use by cleaving a

small portion from the tip. According to the

company, the emitter’s precut polished end

helps maintain resolution of separated com-

ponents before MS analysis. Waters Corpo-

ration, Milford, MA.

www.waters.com

Circle 102

PRODUCTSPRODUCTS

Process-development columnsTosoh’s ToyoScreen process-development

columns feature prepacked Toyopearl resins.

The columns can be used for resin screening,

process-optimization experiments, or micro-

gram-amount purifications. They are

offered in hydrophobic interaction, affinity,

and ion-exchange chemistries in 1- and 5-mL

formats. Tosoh Bioscience, LLC, Mont-

gomeryville, PA.

www.tosohbioscience.com

Circle 101

Light-scattering detectorWyatt Technology’s DAWN HELEOS light-

scattering detector is designed for the

determination of absolute molecular weight

and size of polymers and biopolymers. The

detector reportedly features 18 angles of

detection, a 45-mW gallium arsenide laser

operating at a wavelength of 650 nm, and

HPLC fittings that permit easy connections.

According to the company, the compact

detector can be connected in series to any

chromatographic fractionation system.

Wyatt Technology Corporation, Santa

Barbara, CA.

www.wyatt.com

Circle 100

HPLC columnsThe Ascentis HPLC columns from Supelco

feature endcapped C18 and RP-amide

phases. According to the company, the

columns have ultra high purity silica, are

designed with high surface coverage, and

provide efficient, predictable scale-up, high

loading capacity, and column-to-column

reproducibility. The columns also are avail-

able in semipreparative dimensions.

Supelco, Bellefonte, PA.

www.sigma-aldrich.com/supelco

Circle 105

SFC–MS systemThar offers its SuperDiscovery SFC–MS sys-

tem, a combination of the company’s SFC

system with Waters’ Micromass ZQ mass

detector. The unit features a complete inte-

gration of SFC control embedded in Waters

MassLynx software. Thar Technologies, Inc.,

Pittsburgh, PA.

www.thartech.com

Circle 103

Heavy-metal workstation Chata's CHEM�WORK workstation is

designed to determine the presence of

heavy metals in 10 min. The workstation

comes with the USP reagents that are

required to execute the raw-material test in

the company’s disposable packaging system.

The reagents are connected and maintained

in closed calibrated burettes for on-demand

real-time use. Chata Biosystems, Inc., Fort

Collins, CO.

www.chatasolutions.com

Circle 104

www.chromatographyonline.com

Nanoflow LC systemLC Packings, a Dionex company, offers the

UltiMate 3000 nanoflow LC system,

designed for nanoflow performance. The

system features a dual-gradient micropump,

UV detection, thermostated column switch-

ing, and microautosampling in one tower.

The instrument is optimized for use with

separation columnswith internal diameters

of 50 mm and greater, including high-speed,

high-resolution monolithic columns. Dionex

Corporation, Sunnyvale, CA.

www.dionex.com

Circle 111

MS systemJEOL’s AccuTOF mass spectrometer with

DART ion source is designed to analyze

drugs in pills and capsules without sample

preparation. According to the company, a

pill can be placed in front of the instrument

and the active ingredient can be detected

within seconds. JEOL-USA, Inc., Peabody,

MA.

www.jeol.com

Circle 109

Flash chromatography systemThe CHROMABOND FLASH Safety system

from Macherey-Nagel is designed to offer

safety, optical control, and easy column

exchange. According to the company, the

system features a safety cartridge holder in

four different sizes and metal-covered car-

tridges for increased column life. The system

reportedly can be used as a build-in or

stand-alone system. Macherey-Nagel Inc.,

Easton, PA.

www.mn-net.com

Circle 110

Developing chamberCAMAG’s automatic developing chamber is

designed to improve the reproducibility of

TLC results. According to the company, the

developing chamber addresses the problems

of varying chamber conditions and of vary-

ing layer or plate activation prior to devel-

opment by controlling the variations,

whether they are environmentally or analyst

induced. CAMAG Scientific, Inc., Wilming-

ton, NC.

www.camag.com

Circle 106

Laboratory service and supportPerkinElmer’s OneSource laboratory service

is designed to be a comprehensive service

for instrument care and repair, validation

services to ensure regulatory compliance,

software and hardware upgrades, and edu-

cation and training. According to the com-

pany, the service offers global capabilities,

expert support, a wide range of products

and expertise, and unique profiles.

PerkinElmer Instruments, Shelton, CT.

www.perkinelmer.com

Circle 107

Viscometer systemViscotek’s ARV automated relative viscome-

ter system is designed to determine relative,

intrinsic, inherent, specific, and absolute vis-

cosity as well as molecular weight. The sys-

tem consists of the company's dual-capillary

relative viscometer for the measurement of

the viscosities of dilute polymer solutions,

the Vortex integrated autosampler and

autopreparation module for automated

sample preparation and sample delivery,

and ETA software for data acquisition, pro-

cessing, reporting, and complete system

control. Viscotek, Houston, TX.

www.viscotek.com

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ETD module Bruker Daltonics’ offers an electron transfer

dissociation (ETD) module for the company’s

HCTultra ion-trap mass spectrometer. The

module is designed to preserve functionally

important posttranslational modifications,

such as phosphorylation or glycosylation.

The module allows the on-the-fly collection

of ETD MS-MS spectra of peptides during

LC–MS-MS runs. According to the company,

the module often provides complete amino

acid series down to low ion masses, without

the low-mass cut-off traditionally encoun-

tered in ion-trap MS-MS. Bruker Daltonics,

Billerica, MA.

www.bruker-biosciences.com

Circle 116

SFC-SFE–FTIR systemJasco’s SFC-SFE–FTIR system is designed to

unambiguously identify chromatographed

compounds in real-time. The system can be

used alone or in combination with another

type of spectrophotometric detector. The

system has the ability to search user-created

or commercially available FTIR spectral

libraries. Jasco, Inc., Easton, MD.

www.jascoinc.com.

Circle 112

LC–MS systemShimadzu’s LCMS-2010EV LC–MS system is

designed for a range of applications in the

pharmaceutical, educational, and environ-

mental fields. According to the company,

the system incorporates an ion source that

uses an additional drying gas at the inlet of

the capillary to increase sensitivity and to

control solvent adduct formation. The sys-

tem reportedly features a metal capillary

electrospray probe, revised ion optics, and

microbore compatibility for ESI. Shimadzu

Scientific Instruments, Inc., Columbia, MD.

www.shimadzu.com

Circle 113

Recycling program and packagingMicroLiter offers a recycling program and

packaging for closures and inserts. The

packaging is designed to store and maintain

consumable supplies. The top of the pack

can be cut to dispense like a coin purse, or it

can be installed on the company’s benchtop

dispenser. Users can return empty containers

to the company using a company-provided

UPS return service label so that the contain-

ers can be used on their next order. Micro-

Liter Analytical Supplies, Inc., Suwanee, GA.

www.microliter.com

Circle 117

Phenyl phaseKromasil Phenyl HPLC stationary phase from

Eka Chemicals was developed to be an alter-

native to reversed phases. The phase is wet-

table and compatible with 100% aqueous

mobile phases. The phenyl phase exhibits a

selectivity for aromatic compounds because

of its potential for �–� interactions

between the phase and the solute. The

phase reportedly can be used with mobile

phases in the pH 2–9 range. Eka Chemicals,

Dobbs Ferry, NY.

www.eka.com

Cirlce 114

SPE columnsHoneywell’s Inert II SPE columns are

designed to be equivalent to glass columns.

The columns reportedly are treated to be

inert to solvents and include PTFE inlet and

outlet meshes resulting in no extractable

phthalates, no residual production oil, and

no extraneous peaks. According to the com-

pany, the the SPE columns are available

with Florisil, C8, C18, cyclohexyl, diol, silica,

and alumina packing materials. Honeywell

Burdick & Jackson, Muskegon, MI.

www.honeywell.com

Circle 115

www.chromatographyonline.com

LC–MS systemThe NanoFrontier LC–MS system from

Hitachi is designed for proteomics research.

The system features a linear ion trap with

TOF detection as well as the company’s IBA

intelligent MS–MS and NanoLC system with

a dual-exchange gradient system. According

to the company, the system provides reten-

tion time reproducibility at flows as low as

50 nL/min and can be configured for two-

dimensional chromatography to enable

complete on-line separations of complex

protein samples. Hitachi High Technologies

America, Schaumburg, IL.

www.hitachi-hta.com

Circle 121

Mass spectrometerThermo Electron’s LTQ Orbitrap hybrid mass

spectrometer is designed for small molecule

research, drug discovery, proteomics,

metabolite identification, and

metabolomics. The system reportedly has

subfemtomole sensitivity and multiple ion-

ization modes and inlets. According to the

company, the system requires no internal

calibration and has a wide dynamic range

and high sensitivity for component identifi-

cation in complex matrices. Thermo Electron

Corporation, Waltham, MA.

www.thermo.com

Circle 120

LC systemsDionex’s Summit x2 dual-gradient HPLC and

LC–MS systems are designed for standard

applications and advanced chromatographic

techniques that require two pumps. The sys-

tems consists of two independent low-pres-

sure gradient pumps, a solvent rack that

incorporates the degasser channels for both

pumps, a built-in two-position 10-port ther-

mostated valve in the column compartment,

and an autosampler. The company’s

Chromeleon data-management software is

included with both systems. Dionex Corpo-

ration, Sunnyvale, CA.

www.dionex.com

Circle 123

Ion chromatographMetrohm-Peak’s Metrohm 861 Advanced

Compact ion chromatograph is designed

with a CO2 suppressor feature to eliminate

water dip and system peak in analyses and

increase the linearity range. Chromatograph

components include an MSM II suppressor, a

column oven, a conductivity detector, an

injection valve, a serial dual piston pump,

and a PEEK flow path. According to the

company, the instrument is reliable and

rugged for use in anion, cation, organic

acid, and other suppressed and nonsup-

pressed applications. Metrohm-Peak, Inc.,

Houston, TX.

www.mp-ic.com

Circle 122

HPLC columnsMacherey-Nagel's dual-mode NUCLEODUR

Sphinx RP columns are designed for the sep-

aration of molecules containing aromatic

and multiple bonds. The columns are based

on the company’s NUCLEODUR HPLC silica,

which reportedly has selectivity generated

by a balanced ratio of covalently bonded

octadecyl and phenyl groups. According to

the company, the stationary phase’s end-

capping minimizes surface silanol activity

and enables the analysis of strong basic ana-

lytes. Macherey-Nagel Inc., Easton, PA.

www.mn-net.com

Circle 119

Prescraped rotorsAnaltech’s ready-to-use, prescraped rotors

for the company’s centrifugal chromatogra-

phy system are designed to eliminate the

inconvenience of rotor preparation. Accord-

ing to the company, the packaging can be

used as a storage rack. The rotors are avail-

able in sizes ranging from 1 mm to 8 mm.

Analtech, Inc., Newark, DE.

www.analtech.com

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GC–MS system accessorySGE’s ms NoVent II device is designed to

allow users to change or perform mainte-

nance on columns in a GC–MS system with-

out shutting down the mass spectrometer.

The device is installed directly onto the sys-

tem’s ion source inlet and prevents air from

entering the mass spectrometer while the

column is disconnected. SGE, Inc., Austin,

TX.

www.sge.com

Circle 129

Chromatography refrigeratorsMarvel’s chromatography refrigerators fea-

ture access ports and precise temperature

control. The refrigerators are available in

under-the-counter and larger one- or two-

door models. Model 6CHR features 173 L of

space, a clear tempered glass door, a single-

access port, and a microprocessor-based

temperature control system. Models 21CHR

and 42CHR provide 595 L and 1218 L of

chamber space, respectively, and feature

vapor-proof duplex outlets. Marvel Scien-

tific, Richmond, IN.

www.marvelscientific.com

Circle 126

HPLC componentsShimadzu offers model LC-20A Prominence

HPLC components. A solvent delivery system

provides a 3-nL/step resolution and a dual

microplunger design, with a cycle time of

10 s for a 10-mL injection. Dual-solvent rins-

ing and a temperature-controlled rack

changer for continuous processing are avail-

able. Components are network-ready with

web-based instrument control utilizing the

model CBM-20A system controller and

Microsoft Internet Explorer. Shimadzu Scien-

tific Instruments, Inc., Columbia, MD.

www.shimadzu.com

Circle 127

Immunoaffinity columns and SPEcartridgesGrace Davison Discovery Sciences’ VEN-

TURE immunoaffinity columns and SPE car-

tridges are designed to perform a highly

selective clean-up step that can be directly

coupled on-line to quantitative analysis by

HPLC. According to the company, the

columns eliminate sample preparation

steps, increase accuracy, and lower the cost

of analysis. Grace Davison Discovery Sci-

ences, Deerfield, IL.

www.alltechweb.com

Circle 124

Fraction collectorNanostream offers a fraction collector add-

on to its Veloce micro parallel LC system.

The time-triggered fraction collector is

designed to facilitate the use of the LC sys-

tem as a front-end sample preparation sys-

tem for drug metabolism–pharmacokinetic

assays and other bioanalytical applications.

The fraction collector outputs collected frac-

tions to SBS-standard plates. The collector

incorporates a dedicated rinse station and

an integrated plate changing system with

the capacity to transfer as many as 70

plates. Nanostream, Pasadena, CA.

www.nanostream.com

Circle 125

GC modulesGerstel’s MACH modular accelerated column

heater column modules incorporate low

thermal mass technology with direct resis-

tive heating and integrated temperature

sensing. The modules use standard capillary

columns. GC parameters can be controlled

through Agilent’s ChemStation software,

and as many as four modules can be con-

trolled through one system. Gerstel, Inc.,

Baltimore, MD.

www.gerstelus.com

Circle 128

www.chromatographyonline.com

Guard columnsGuardian integrated guard columns from

Phenomenex have a 5- or 10-m section of

nonbonded tubing manufactured as part

of the standard analytical column. Accord-

ing to the company, the guard columns

have no potential for leaks and are deacti-

vated using a proprietary surface modifica-

tion technique to provide high response

for both acids and bases. Phenomenex,

Inc., Torrance, CA.

www.phenomenex.com

Circle 130

Ion chromatography systemDionex’s ICS-3000 Reagent-Free ion chro-

matography system is designed to increase

productivity and overall system performance

as much as 10-fold. The system can be

upgraded to perform dual analyses without

increasing the system footprint or requiring

a second autosampler. The system’s chemi-

cally inert flow path is designed to with-

stand pH extremes and protect samples

from metal contamination. A touchscreen

tablet PC mounted on a movable arm pro-

vides system control. Dionex Corporation,

Sunnyvale, CA.

www.dionex.com

Circle 134

Protein removal systemThe Agilent High-Capacity Multiple Affinity

Removal system is designed to allow purifi-

cation of approximately twice the volume of

human blood serum per sample compared

with other protein removal systems. Accord-

ing to the company, the system can detect

and identify low-abundance proteins that

may serve as markers for a wide range of

diseases. The system is available in HPLC col-

umn or spin cartridge formats. Agilent Tech-

nologies, Inc., Palo Alto, CA.

www.agilent.com

Circle 131

Gas pyrolysis systemCDS Analytical’s model 5200 reactant gas

pyrolysis system features a built-in analytical

trap that can be used in pyrolyzing samples

in air off-line, thereby preventing air from

entering the GC columns or MS detector.

The system reportedly also can be used as a

stand-alone thermal-desorption instrument.

According to the company, the system is

programmable in 1 °C increments up to

1400 °C and allows eight-step programming

for each sample run. CDS Analytical, Inc.,

Oxford, PA.

www.cdsanalytical.com

Circle 132

HPLC column Restek’s Pinnacle II Biphenyl column is

designed to provide accurate confirmation

of explosives by isocratic analysis. The col-

umn reportedly can be used as the confir-

mation column for EPA Method 8330 explo-

sives. According to the company, the column

has different selectivity than the C18 pri-

mary phase and provides better resolution

than cyano stationary phases. Restek Corpo-

ration, Bellefonte, PA.

www.restek.com

Circle 133

Syringe filtersWhatman’s GD/X syringe filter is designed

for sample preparation for hard-to-filter

samples such as food and beverage,

tobacco, and environmental samples. The

filters contain four filtration layers of

microfiber to reduce blockage and increase

throughput. The filter is manufactured with

a polypropylene housing. Multiple filter

types are available. Whatman, Inc., Florham

Park, NJ.

www.whatman.com

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TOF mass spectrometerWaters’ GCT Premier bench-top TOF mass

spectrometer is designed for the characteri-

zation of volatile compounds by way of

exact mass and elemental composition

determination by coupling GC with orthog-

onal acceleration TOF-MS. According to the

company, the instrument offers a variety of

ionization options, a 20-scans/s spectral

acquisition rate, a dynamic range of up to

four orders of magnitude, and a 7000

FWHM resolution. Waters, Milford, MA.

www.waters.com

Circle 136

Proteomics separation system Alfa Wassermann’s FOCUS proteomics sepa-

ration system is designed for the fractiona-

tion of organelles by proteomics continu-

ous-flow ultracentrifugation separation.

According to the company, the system links

fractionation and protein component

enrichment to the subcellular organization

of the organelles. The system reportedly

provides sample enrichment, low-abun-

dance component isolation, compound sub-

type separation, and accumulation. Alfa

Wassermann Proteomic Technologies, LLC,

West Caldwell, NJ.

www.alfawassermannus.com

Circle 139

Preparative SFC systemMettler-Toledo’s MultiGram III Berger

preparative SFC system is designed to meet

the growing demand for higher sample

throughput for chiral and achiral drug

purification applications. According to the

company, the system provides higher flow

rates and the ability to accommodate an

expanded range of high-capacity prepara-

tive columns. Purified samples are recov-

ered in small volumes of organic solvents.

The instrument reportedly offers sample

output of 10 g/h or more per compound.

Mettler-Toledo AutoChem, Inc., Columbia,

MD.

www.mt.com/autochem

Circle 138

GC–MS systemThermo Electron’s FOCUS-PolarisQ ion-trap

GC–MS system is designed for applications

such as forensic, toxicological, environmen-

tal, and flavor and fragrance analyses. The

system reportedly uses external ionization

for productivity and reliability while provid-

ing library-searchable spectra. According to

the company, the system integrates full-scan

MS and MS-MS modes by simultaneously

capturing both spectra for each peak in the

chromatogram. Thermo Electron Corpora-

tion, Waltham, MA.

www.thermo.com

Circle 140

SPME applications CDSupelco offers its fifth edition SPME applica-

tions CD. The CD provides a comprehensive

list of technical literature with publications

on SPME quantitation, flavor compounds,

drugs in biological fluids, forensic analysis,

and theory and optimization of conditions.

The CD also features over 1500 literature

references on the use of SPME in areas such

as food and beverage, flavors and fra-

grances, forensic analysis, toxicology, phar-

maceutical–biotechnology, and environmen-

tal. Supelco, Bellefonte, PA.

www.sigma-aldrich.com/supelco

Cirlce 137

GC–electron capture detection systemLECO’s GC�GC–ECD system is designed as a

solution for the identification and quantifi-

cation of difficult samples including pesti-

cides. According to the company, a single

detector can perform two independent sepa-

rations on a sample in a single analysis. LECO

Corporation, St. Joseph, MO.

www.leco.com

Circle 141

www.chromatographyonline.com

Ferrules and nutsSGE’s SilTite metal ferrules for fused-silica

GC columns are designed to provide a leak-

free seal at the GC–MS interface. The fer-

rules reportedly reduce background noise

and make mass-spectral identification eas-

ier at lower levels. According to the com-

pany, the ferrule and the nut have the same

thermal expansion coefficient, thereby

eliminating the need to retighten the fer-

rule after initial temperature cycles. SGE,

Inc., Austin, TX.

www.sge.com

Circle 143

Software packageTrilution LC software from Gilson features

graphical gradient creation and adjust-

ments, click-and-drag icon-based tasks, and

graphical method optimization. According

to the company, the software package pro-

vides fraction collection capabilities includ-

ing conditional logic collection, the ability

to add additional fraction collectors for

increased bed capacity, intuitive slope col-

lection parameters, and automatic sample

list generation of collected fractions for

postcollection processing. Gilson, Inc.,

Middleton, WI.

www.gilson.com

Circle 142

Column exchangerAnalytical Sales' PowerSELECTOR ELITE six-

position LC column exchanger incorporates

selector valves and a Peltier bidirectional

heat pump to switch columns while cooling

or heating the compartment. According to

the company, the automated system offers a

temperature range of 10 ºC below ambient

to 45 ºC with �1 ºC accuracy and repeatabil-

ity precision of �1 ºC. Analytical Sales and

Services, Inc., Pompton Plains, NJ.

www.analytical-sales.com

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Electron multiplierBURLE’s model 5905 MAGNUM is designed

to be a compact replacement electron multi-

plier for Thermo Finnigan MS instruments.

According to the company, the detector

offers higher performance, improved linear-

ity, and lower noise compared with OEM

electron multipliers. The electron multiplier

is a one-piece plug-in replacement that fits

directly into the Thermo Finnigan mounting

assembly. BURLE, Electro-Optics, Inc., Stur-

bridge, MA.

www.burle.com

Circle 145

Prepackaged HPLC mobile phasesCHATA’s CHEM�NECT prepackaged solu-

tions are designed to be an alternative to

traditional HPLC mobile phase preparation.

According to the company, GMP procedures

are used to prepare standard or custom-

blended chemistry solutions according to

customer specifications. The company's

patented, flexible film packaging system

ensures sterile, filtered, and degassed solu-

tions. The packaging system uses reagent-

grade components that can be connected to

any HPLC system. CHATA Biosystems, Fort

Collins, CO.

www.chatasolutions.com

Circle 147

Syringeless filter Whatman’s Mini-UniPrep syringeless filters

are designed to remove particulates from

samples being prepared for HPLC analysis.

According to the company, the filters can be

used with standard robotics on HPLC systems

with sensitive needles, and the filter’s slit

septum caps enable use with robotics for

high throughput automation. The filters

reportedly increase needle longevity by elim-

inating coring problems associated with

repeated sampling. The filters are compati-

ble with most autosamplers and are avail-

able in 0.2- and 0.45-�m pore sizes. What-

man, Inc., Clifton, NJ.

www.whatman.com

Circle 146

Application noteESA offers an application

note for the measurement

of the macrolide antibiotic

azithromycin using

charged aerosol detection.

The note discusses univer-

sal detection of non-

volatiles with a response

independent of chemical

structures. ESA, Inc.,

Chelmsford, MA.

www.esainc.com

Circle 151

Instrumentation catalogJasco’s 2005 catalog features

its line of spectroscopy and

chromatography instrumenta-

tion. It describes instruments

such as circular dichroism,

FT–IR, Raman, UV–vis-NIR, and

fluorescence spectrometers,

polarimeters, and HPLC and

SFE–SFC systems. Jasco, Inc.,

Easton, MD.

www.jascoinc.com

Circle 153

LITERATURELITERATURE

774 LCGC NORTH AMERICA VOLUME 23 NUMBER 8 AUGUST 2005

2005 catalogThe Upchurch Scientific/Rheo-

dyne Catalog of Chromatogra-

phy and Fluid Transfer Prod-

ucts includes valves, pumps,

and accessories from sister

IDEX Corp. business units

Rheodyne, Ismatec, and

Micropump. Nanoscale to

preparative scale fluidic com-

ponents offered. Upchurch Sci-

entific, Oak Harbor, WA.

www.upchurch.com

Circle 154

Light-scattering brochureWyatt has revised the com-

pany's 28-page brochure enti-

tled “Ultimate Guide to Buy-

ing a Light-scattering

Instrument.” The brochure

highlights the company’s

macromolecular characteriza-

tion instruments, software,

and accessories. Wyatt Tech-

nology Corporation, Santa

Barbara, CA.

www.wyatt.com

Circle 152

On-line training modulesAgilent’s on-line technical training modules

are designed to give researchers the knowl-

edge and the ability to improve the perform-

ance of GC or GC–MS instruments. The on-

demand, live learning modules are accessible

on the Internet. According to the company,

the training helps chromatographers

enhance their existing skills, obtain training

on new instruments, and fulfill industry

training requirements. Agilent Technologies,

Inc., Palo Alto, CA.

www.agilent.com

Circle 148

Ion chromatography columnShodex’s model IC SI-91 4C ion chromatogra-

phy column is designed for for oxyhalide

analysis. The column is available with

dimensions of 100 mm � 4 mm. According

to the company, the column creates the sep-

aration between chlorate and bromate by a

suppressor–postcolumn method. The pack-

ing material is 9-�m polyvinyl alcohol gel.

Shoko America, Inc., Colorado Springs, CO.

www.shodex.com

Circle 149

Autosampler vial kitsAutosampler vial kits containing vials and

closures from National Scientific are

designed for use with autosamplers for ana-

lytical and semipreparative chromatography.

Each kit comes with a certificate of analysis.

National Scientific Company, Duluth, GA.

www.nationalscientific.com

Circle 150

www.chromatographyonline.com