Multianion analysis, applications of ion chromatography - Determination of Anions in Natural and Treated Waters - page 666

Table 12.13 Concentrations of calibration standard and various dilutions determined by
ion chromatography method

Concentrations (mg L −1 )

Cl − NO 3 − SO 4 −

A. Laboratory Standard 1.49 1.64 1.52

Concentration by ion chromatography method 1.42

1.48
1.48
1.47

1.57
1.57
1.62
1.62

1.56
1.40
1.53
1.51

Mean 1.46 1.62 1.50

Standard deviation 0.03 0.03 0.07

B. Laboratory standard 0.75 0.82 0.76

(1:2 dilution) concentration by 0.76 0.80 0.73

ion chromatography method 0.74

0.74
0.74

0.80
0.80
0.79

0.81
0.78
0.81

Mean 0.75 0.80 0.78

Standard deviation 0.01 0.01 0.04

C. Laboratory standard 0.37 0.41 0.38

(1:4 dilution) concentration 0.36 0.37 0.51

ion chromatography method 0.36

0.34

0.38
0.40

0.45
0.43

Mean 0.36 0.38 0.45

Standard deviation 0.01 0.01 0.05

D. Laboratory standard 0.19 0.21 0.19

1:8 concentration 0.19 0.18 0.12

by ion chromatography method 0.17

0.18
0.17

0.21
0.20
0.18

0.23
0.22
0.19

Mean 0.18 0.19 0.19

Standard deviation 0.01 0.02 0.05

Source: Reproduced with permission from the Journal of Oceanographic Science [61]

The accuracy of the method was considered by determination of the concentration of
chloride, nitrate and sulphate in an EPA nutrient/ mineral standard. The results are shown