Continuous Hydride Generation-Atomic Absorption Method for the Determination of Selenium and Arsenic in Foods

Alvarez, George H.; Capar, Stephen G

doi:10.1080/00032719108053004

Cited by 5 publications

(2 citation statements)

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“…Thus, it is evident that up to that concentration of potassium hydrogen sulphate an increasing amount of (H 3 O þ ) in the solution increases the efficiency of the reduction. [5,14,18,22,23,30] The influence of different amounts of sodium borohydride on the generation of selenium is shown on Figure 3. Therefore, the optimum concentration of potassium hydrogen sulphate for the quantitative determination of selenium was taken as 0.…”

Section: Optimization Of Experimental Conditionsmentioning

confidence: 99%

“…[5,[13][14][15][16][17][18][19][20][21][22][23] The high yields of hydride, [24,25] the very fast reaction (estimated to take place within less than 10 ms), [26] and the relatively low consumption of reductant, make HG an almost ideal pre-separation step, which in combination with proper analytical techniques [29,31,33,34,36] achieves detection limits at pg/ ml Se levels. Selenium in particular forms very readily selenium hydride, H 2 Se, if it is present in the tetravalent state Se(IV).…”

Section: Introductionmentioning

confidence: 99%

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Determination of Selenium in Drinking Water With a Simple Field Device

2002

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A new method for the determination of total selenium in drinking water in the low ppb range was developed and optimized. The method use field device Supralab FD which was previously designed for the determination of arsenic in drinking water. The method relies on the formation of selenium hydride and its reaction with sodium perborate impregnated on a support to form a colored product, elemental selenium, which is optically detected. As a reductant, sodium borohydride is used. Thus, only Se(IV) reacts whereas Se(VI) cannot be reduced directly requiring pre-reduction with hydrochloric acid. The limit of detection of method (3) is 0.7 mg/dm 3 , the limit of quantification is 2 mg/dm 3 . The total reaction time for concentration up to 10 mg/dm 3 is 5 min; higher concentrations require up to 15 min. 943

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Section: Optimization Of Experimental Conditionsmentioning

confidence: 99%