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RESULTS AND CALCULATION Solution Reading (mg/L) Blank 0.00 Standard 0.99 Sample A 0.54 Sample B (Duplicate) 0.55 NH 3 -N (mg/L) = NH 3 -N (value from spectrophotometer) Solution NH3-N (value from spectrophotometer) NH3-N (mg/L) Blank NH3-N 0.00 0.00 Standard NH3-N 0.99 0.99 Sample A NH3-N 0.54 0.54 Sample B (Duplicate) NH3-N 0.55 0.55

Results and Calculation

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RESULTS AND CALCULATIONSolutionReading (mg/L)

Blank0.00

Standard0.99

Sample A0.54

Sample B (Duplicate)0.55

NH3-N (mg/L) = NH3-N (value from spectrophotometer)SolutionNH3-N (value from spectrophotometer)NH3-N (mg/L)

BlankNH3-N 0.000.00

StandardNH3-N 0.990.99

Sample ANH3-N 0.540.54

Sample B (Duplicate)NH3-N 0.550.55