Multianion analysis, applications of ion chromatography - Determination of Anions in Natural and Treated Waters - page 694

electrode (as it has all

Fig. 12.38 Simultaneous analysis by using electrochemical and conductivity
detection. Concentrations are 300µg L −1 sulphide, 500µg L −1
cyanide, 1 mg L −1 fluoride, 4mg L −1 chloride, 10mg L −1 nitrites,
10mg L −1 bromide, 25mg L −1 nitrate, 30mg L −1 sulphite, 25mg L −1
sulphate and 50mg L −1 phosphate
Source: Reproduced with permission from the American Chemical
Society [23]

Table 12.30 Determination of 1mg L −1 cyanide in the presence of sulphide

Amt of added
S 2− , mg L −1

Recovery of
CN − , %, ±2%

0 100

0.10 109

1.00 112

10.0 104

Source: Reproduced with permission from the American Chemical Society [23]

eluted) and since the applied potential is below the diffusion controlled plateau, silver
chloride reduction is favoured in order to satisfy the Nernst equation. A small dip