Comprehensive Water Analysis by T R Crompton

By T R Crompton

This ebook brings jointly in a single position all on hand info at the choice of metals, organics, organometallic compounds, anions, cations, dissolved gases, radioactive elements and miscellaneous determinands in common and handled waters.

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14 Lead Electrothermal atomic absorption spectrometry Numerous publications have appeared on the determination of lead in potable water by electrothermal techniques91–97. 98 Atom trapping techniques have also been used99. Regan and Warren96 analysed potable water samples from England and Wales using carbon furnace atomic absorption spectrophotometry. Spiking experiments carried out in order to determine the severity of the matrix interference revealed a suppression of the lead signals ranged from 22 to 84 per cent.

Routine use. 31 (multication analysis). Preconcentration Bertenshaw and Wagstaffe127 have described a preconcentration technique for use in the cold vapour atomic fluorescence determination of mercury in potable water. This method employs a trap containing potassium permanganate. Mercury can be determined in the concentration range 4–700 ng l−1. 42 WATER ANALYSIS—2 Fig. 10. Mercury concentration of city potable water. 18 Molybdenum Spectrophotometric kinetic methods have been described for the determination of molybdenum in potable water128,129.

31 (multi-cation analysis). 24 Silver Spectrophotometric methods Methods based on spectrophotometry with p-dimethylaminobenzylidenerhodanine and dithizone137 and on the ring oven technique138 have been described for the determination of silver in potable water but these are only capable of determining silver in the mg l−1 range. Bancells et al139 have described an inductively coupled plasma emission spectroscopic technique for the determination of down to 2 µ g l−1 silver in potable water. These workers compared determinations of silver obtained by this technique with those obtained by extraction with ammonium pyrrolidine dithiocarbamate, diethylammonium diethyldithiocarbamate and methylisobutylketone, followed by for silver by flame atomic absorption spectrometry.

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