Anions in non saline waters - Determination of Anions in Natural and Treated Waters - page 153

Fig. 2.18 Chromatogram of orthophosphate, pyrophosphate tripolyphosphate,
trimetaphosphate and tetrapolyphosphate Column is µ-Bondapak.
NH 2 and the eluant was oxalate-Mg buffer at the flow rate of 1.0ml
min −1 , 50µL of mixed solution containing 10 −3 mol L −1 of each
phosphate
Source: Reproduced with permission from the American Chemical
Society [237]

Table 2.15 A Elution recovery of orthophosphate from high performance liquid
chromatography column at different sample concentrations

Concn, mol L −1

Emission intens integrated Recovery (%)

10 −3

114 100

10 −4

125 109

10 −5

108 95

10 −6

100 87

Source: Reproduced with permission from the American Chemical Society [237]

chosen for the most dilute sample (10 −6 mol L −1 ). Recovery from the column is listed in
Table 2.15.
In Fig. 2.18 a typical chromatogram obtained by this technique for a mixture of