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Application of hydride generation to the determination of trace concentrations of arsenic by capacitively coupled microwave plasma

✍ Scribed by Dennis M. Hueber; Wellington R.L. Masamba; Bill M. Spencer; James D. Winefordner

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
615 KB
Volume
278
Category
Article
ISSN
0003-2670

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✦ Synopsis

Studies are presented describing an application of the NaBH, reduction of soluble arsenite to form arsine for ultra-trace level arsenic determination by capacitively coupled microwave plasma atomic emission spectrometry. The amine was condensed in a liquid nitrogen cooled trap, and introduced into the plasma atIer the elimination of reaction by-products that would reduce the excitation efficiency of the plasma. Use of a photodiode array detector provided a means of background correction. The procedure resulted in a liiit of detection of 110 pg and a linear dynamic range of lo4 for arsenic.

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## AbStrsCt Continuous-flow generation of plumbane from different media for sample introduction into an inductively coupled plasma (ICP) for the determination of lead by atomic emission spectrometry (AES) was investigated in detail. Different "organized molecular assemblies" (micelies and vesicles