Part A Measurement o f the anionic surfactant content in water samples

Experimental data A.l LAS calibration curve.

Anionic surfactant used as standard:_

Concentration of the standard solution:_mg/L of LAS

Wavelength used in the spectrophotometric measurement:_nm

Volume of standard/ 10 mL of solution

Concentration of anionic surfactant, mg/L

Absorbance

0

0.3

0.5

0.8

1

1.5

2

2.5

3

3.5

4

Calibration curve equation: mg/L LAS =

Calibration curve equation: mg/L LAS =

Correlation coefficient, r2 —

A.2 Surfactant content in several water samples.

Sample A.2.1 Surface water.

Source:_

Observable characteristics:_

Sample A.2.2 Detergent-containing water

Source:_

Observable characteristics:_

pH of original sample:_

Sample A.2.3 Detergent-containing water

Source:_

Observable characteristics:_

pH of original sample:_

Sample A.2.4 Soap-containing water

Source:_

Observable characteristics:_

pH of original sample:_

Sample A.2.5 Wastewater treatment plant sample

Source:_

Observable characteristics:_

pH of original sample:.

Sample No.

Type of sample

Absorbance

LAS concentration, mg/L

A.2.1

A.2.2

A.2.3

A.2.4

A.2.5

Calculation example:

0 0

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