Multianion analysis, applications of ion chromatography - Determination of Anions in Natural and Treated Waters - page 673

1000 5 .119 30 6.140 6.14

500 5 .0597 30 2.807 2.81

500 5 .0597 3 3.158 3.16

100 5 .0119 3 .579 .579

50 5 .00597 3 .281 .281

20 50 .0239 3 1.491 .149

15 50 .0179 3 1.105 .111

10 50 .0119 3 .754 .075

8 50 .00955 3 .579 .058

5 50 .00597 3 .351 .035

2 50 .00239 3 .158 .016

Source: Reproduced with permission from the American Chemical Society [58]

Yamamoto et al. [2] and Matsuchita [62] have described a method for the determination
of chloride, phosphate, nitrate, nitrite, sulphate, calcium and magnesium in rainwater.
They used 1m mol L −1 EDTA as an eluent and a silica based anion exchange column.

Table 12.19 Comparison of trace samples analysed immediately after loading and after 7
days storage

Ion Concn. µg

L −1

Peak height a After 0 days
(mm)

Peak height? After 7 days
(mm)

RSD
(%)

Cl −

5 147 165 12.7

20 23 22 0.7

PO 4
3-

NO 3

20 24 21 2.0

20 23 27 2.8

SO 4
2−

a Composite standard of 100ml was loaded on each concentrator
Source: Reproduced with permission from the American Chemical Society [58]

Table 12.20 Adjusted retention times

Rt/min −1 Rt/min −1 Cations

Anions

Cl −

3.4 Ca 2+

7.4