Sorbent Media-XAD

Sorbent Media-XAD

DefinitionDefinition In line collection point for desired In line collection point for desired

contaminantcontaminant PurposePurpose

Collection of particulate matter Collection of particulate matter Serves as “capture” point of sampling Serves as “capture” point of sampling

train for later analysistrain for later analysis

Specific Specific Surface Surface AreaArea

Upper Upper TemperatTemperature Limiture Limit

CompositiCompositionon

XAD-2XAD-2 300-400 300-400 m2/gm2/g

200-250C200-250C CopolymeCopolymer of r of styrene styrene and and benzenebenzene

XAD-4XAD-4 500-850 500-850 m2/gm2/g

200-250C200-250C CopolymeCopolymer of r of styrene styrene and and benzenebenzene

XAD-7XAD-7 325-450 325-450 m2/gm2/g

200-250C200-250C Acrylate Acrylate polymerpolymer

Sorbent Media-XAD

Used for collection ofUsed for collection of Organophosphorous pesticidesOrganophosphorous pesticides

FormaldehydeFormaldehydeUsing XAD-2 coated with 2-Using XAD-2 coated with 2-

(hydroxymethyl) piperidine(hydroxymethyl) piperidine

Sorbent Media-XAD

CalibrationCalibration RotameterRotameter

Flow is calibrated against ball Flow is calibrated against ball “floating” in air in the chamber“floating” in air in the chamber

Bubble tube(Manual or Electronic)Bubble tube(Manual or Electronic)Flow is calibrated by timing bubble Flow is calibrated by timing bubble

travel speed in vertical columntravel speed in vertical column

Sorbent Media-XAD

Filter CassettesFilter Cassettes

Filter Cassette HolderFilter Cassette Holder

References Cited

SKC Inc. Corporate Web PageSKC Inc. Corporate Web Page

http://www.skcinc.com/http://www.skcinc.com/ accessed 04/03/01 accessed 04/03/01

Bibliography

DiNardi Salvatore R. (1998) DiNardi Salvatore R. (1998) The The Occupational Environment-Its Evaluation Occupational Environment-Its Evaluation and Controland Control, AIHA, Fairfax, Virginia , AIHA, Fairfax, Virginia

Goetsch David L. (1999) Goetsch David L. (1999) Occupational Occupational Safety and Health for Technologists, Safety and Health for Technologists, Engineers, and ManagersEngineers, and Managers, Prentice Hall, , Prentice Hall, Upper Saddle River, New Jersey Upper Saddle River, New Jersey