By T R Crompton

ISBN-10: 1851667504

ISBN-13: 9781851667505

This publication brings jointly in a single position all on hand details at the decision of metals, organics, organometallic compounds, anions, cations, dissolved gases, radioactive elements and miscellaneous determinands in common and taken care of waters.

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In Table 9 are reported results on potable water samples obtained by this technique, also by direct injection atomic absorption spectroscopy, graphite furnace atomic absorption spectroscopy, and differential pulse anodic scanning voltammetry. The graphite furnace method employed did not allow for matrix TABLE 9 Determination of lead in drinking water by four methods (µ g/l) Graphite furnace atomic absorption Differential pulse anodic scanning spectrometry voltammetry Sample Atomic absorption spectrometry Hydride atomic absorption spectrometry As received Co-precipitated As received Digested with nitric acid 1 2 49 35 38 44 54 30 45 27 55 33 64 41 POTABLE WATERS 33 Graphite furnace atomic absorption Differential pulse anodic scanning spectrometry voltammetry Sample Atomic absorption spectrometry Hydride atomic absorption spectrometry As received Co-precipitated As received Digested with nitric acid 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 80 78 75 166 567 14 117 10 416 90 155 348 37 102 35 8 31 31 116 155 48 60 48 124 201 39 58 33 171 38 76 132 25 53 33 5 24 14 56 54 54 88 110 168 565 12 111 12 392 73 141 304 35 105 30 8 32 20 120 120 50 48 57 153 498 9 88 7 380 75 126 277 26 88 21 6 28 17 101 106 54 60 75 210 482 14 101 9 450 89 155 370 31 116 33 8 39 21 130 150 69 67 76 184 539 14 118 10 462 82 130 344 34 113 40 8 42 32 142 140 interference and this is seen in the poor agreement of lead contents obtained between this and the other methods.

Miller et al105 studied the influence of time of acidification after sample collection on the preservation of potable water samples for lead determination. Potable water samples containing known concentrations of lead between 26 and 105 µ g l−1 were acidified at different time intervals after collection, up to 14 days. The water samples were then stored at room temperature for varying times prior to lead determination by flameless atomic absorption spectrometry with deuterium background correction.

Directly and following a 48 h batch extraction of 50 ml of water. Lead removal by the poly (maleic anhydride) resin was complete for both high and low alkalinity samples. Activated alumina Lead has been deposited on a microcolumn of activated alumina and eluted with nitric acid prior to its determination by flame atomic absorption spectrometry111. A detection limit of 0·36 µ g l−1 was achieved. Ammonia precipitation Martinez-Gomez et al112 give details of a preconcentration procedure whereby lead is continuously precipitated with ammonia from water prior to its determination by atomic absorption spectrometry.

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Comprehensive Water Analysis by T R Crompton


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