Multianion analysis, applications of ion chromatography - Determination of Anions in Natural and Treated Waters - page 632

50 107 104 103 105 99 106

70 101 106 106 108 106 102

100 106 101 108 104 102 108

SO 4 2−
10

96 94 94 90 106 110

30 95 112 101 93 93 103

50 109 102 100 94 90 93

70 101 98 99 91 90 93

100 101 97 97 94 90 93

Source: Reproduced with permission from the American Chemical Society [14]

Fig. 12.11 Calibration chromatogram for a 250nm anion separator column
using standard 8 containing 0.1µg mL −1 F − ; 0.1µg mL −1 Cl − 0.1µg
mL −1 PO 4 3− ; 1.0µg mL −1 NO 3 − and 1.0µg mL −1 SO 4 2−
Source: Reproduced with permission from Elsevier Science [10]

Typical chromatograms obtained from a sample of northern Ontario stream water are
shown in Fig. 12.11 (500mm column). It is evident from these illustrations that no
advantage is gained by using the 500mm column rather than the 250mm column. The
time for analysis is more than doubled and peak heights have decreased. The increased
separation of anion chromatographic peaks is not required for this sample type.
V an Os et al. [ 11] achieved complete separations in 6min of 1-30mg L −1
concentrations of bromide, chloride, nitrite, nitrate and sulphate using a Zipax SAX
separation column, with eluant suppression and electrical conductivity detection. The
necessary high pressure packing techniques for packing the separation column is