Device for field determination of selected heavy metals in natural waters

Coleman, David; Atta, R. E. Van; Klatt, Leon N.

doi:10.1021/es60064a008

Cited by 2 publications

(3 citation statements)

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“…The circuit was powered by two 12-V Burgess CD27 batteries. 1 The system was normally used in the laboratory in conjunction with a charger. Output voltage was read using a Heath SM-4440 digital voltmeter.…”

Section: Methodsmentioning

confidence: 99%

“…With the increased availability of low cost, reliable and small solid state operational amplifiers (OA's), it would seem that these objections could be largely overcome and that the ease of sample preparation, accuracy, and reliability of polarographic methods would warrant their reexamination. During the course of this work, a portable polarographic analyzer has been described (1) that takes advantage of these advances in technology.…”

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confidence: 99%

“…Because nitrate reduction is observed at the DME only in the presence of metal ion catalysts such as La(III) (2, 3), Zr(IV) (4), and U(VI) (5), the possibility exists to compensate directly for interferences that are reduced at the same potential by a simple differential measurement. 1 On sabbatical at the University of Georgia, Athens, Ga.…”

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confidence: 99%

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Determination of nitrate in water samples using a portable polarographic instrument

Young¹,

Spell²,

Siu³

et al. 1975

Environ. Sci. Technol.

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with analyses of radioactive cadmium (5). Results showed that the flameless technique was in better agreement with the radioactive analyses of cadmium than the chelation/ solvent extraction technique, whose results were consistently lower. Thus, the accuracy of the results was better with the flameless method. SummaryFlameless atomic absorption spectroscopy has been shown to be a precise, rapid, and accurate method for analysis of low concentrations of trace metals. When confronted with analyses for this range of concentrations, the' flameless method proves to be advantageous over the chelation/solvent extraction method. No major interferences are noted and the decrease in sample handling reduces the possibility of sample contamination, while the detection limit is reduced to a lower value.

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Section: Methodsmentioning

confidence: 99%

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confidence: 99%