Part B Measurement of the ophosphate content in water samples

Experimental data.

B.l P-phosphate calibration curve.

Phosphate compound used as standard:_

Concentration of the standard solution:_mg/L of phosphorus (P)

Wavelength used in the spectrophotometric measurement:_nm

Volume of standard/10 mL of solution

Concentration of P, mg/L

Absorbance

0

0.2

0.5

1

1.5

2

2.5

3

4

5

Calibration curve equation: mg/L LAS =_

Correlation coefficient, 12 =_

B.2 P-o-phosphate content in several water samples. Sample B.2.1 Surface water.

Source:_

pH of original sample:_

Sample B.2.2 Detergent-containing water

Source:_

pH of original sample:_

Sample B.2.3 Detergent-containing water

Source:_

Sample B.2.4 Wastewater treatment plant sample

Source:_

pH of original sample:_

Sample B.2.5 Soap-containing water Source:_

pH of original sample:.

P concentration,

Sample No.

Type of sample

Absorbance

mg/L

B.2.1

B.2.2

B.2.3

B.2.4

B.2.5

Calculation example:

0 0

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