MCU14/0056 Response to SARA - Consulting Report

Table A.1 — 10 mi extract, working range 1 mg/l to 40 mg/1

EN 858-1:2002 (E)

 

 

 

 

 

 

 

Oil in spiked petroleum ether (mg/l) Equivalent oii in water (mg/l)
400 8
800 16
1 200 24
1 600 32
2 000 40

 

 

 

Table A.2 — 25 ml extract, working range 10 mg/I to 150 mg/l

 

 

 

 

 

 

Oil spiked petroleum ether (mg/l) Equivalent oil in water (mg/l)
600 30
4200 60
4 800 90
2 400 120
3 000 150

 

 

 

Calculate a calibration function by linear regression of the peak areas and oil in petroleum ether concentrations.

A.3.8 Calculation of the oil concentration

The mass concentration of the hydrocarbons is obtained from:

where

G fis the concentration of hydrocarbons in the water sample, in mg/l;

a is the slope of the calibration function, in I/mg;

Am _ is the peak area of the sample extract, in instrument specific units;

f is the dilution factor;

m, _ is the mass of the filled sampling bottle or separating funnel, in g;

Mm __ is the mass of the empty sampling bottle or separating funnel, in g;

V is the volume of the final extract, in mi;

b is the intercept of the calibration function, in instrument specific units;

w Is the density of water, (1,00 g/ml).

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