Determination of selenium in water and industrial effluents by flameless atomic absorption

1975 ◽  
Vol 47 (3) ◽  
pp. 428-432 ◽  
Author(s):  
Earl L. Henn
Keyword(s):  
Atomic Absorption ◽  
Industrial Effluents ◽  
Flameless Atomic Absorption

scholarly journals Determination of Trace Metals in Cigarette Smoke by Flameless Atomic Absorption Spectrometry

1978 ◽  
Vol 9 (4) ◽  
Author(s):  
M. A. Perinelli ◽  
N. Carugno
Keyword(s):  
Trace Metals ◽  
Atomic Absorption ◽  
Gas Phase ◽  
Cigarette Smoke ◽  
Absorption Spectrometry ◽  
Total Particulate Matter ◽  
Flameless Atomic Absorption ◽  
Flameless Atomic Absorption Spectrometry ◽  
Quick Determination

Abstract A flameless atomic absorption method has been developed which permits the quick determination of the levels of trace metals in cigarette smoke. The total particulate matter (TPM) was collected by electrostatic precipitation and dissolved in methanol before analysis. In order to trap the last remaining traces of metals, the gas phase was passed through microporous filters which were analysed direct. The sensitivity of this method for the metals studied (Zn, Pb, Cd, Ni) is good in both the particulate and gas phase samples, with the sole exception of Ni in the gas phase. Results obtained by the flame and flameless methods are compared.

Determination of Mercury in Food Products and Biological Fluids by Aeration and Flameless Atomic Absorption Spectrophotometry

1971 ◽  
Vol 54 (1) ◽  
pp. 206-210 ◽  
Author(s):  
Virginia A Thorpe
Keyword(s):  
Atomic Absorption ◽  
Biological Fluids ◽  
Food Products ◽  
Atomic Absorption Spectrophotometry ◽  
Good Precision ◽  
Flameless Atomic Absorption ◽  
Absorption Spectrophotometry ◽  
Wet Digestion ◽  
Mercury In Fish

Abstract This paper describes a simple, rapid modification of a method developed at the Fisheries Research Board of Canada for determining mercury in fish and other food products. Wet digestion and flameless techniques of atomic absorption spectrophotometry are used. Replicate analyses on different days showed good precision and samples spiked with known amounts of mercury showed adequate recovery.

Determination of Methyl Mercury in Fish by Flameless Atomic Absorption Spectroscopy and Comparison with an Acid Digestion Method for Total Mercury

1976 ◽  
Vol 59 (1) ◽  
pp. 153-157
Author(s):  
Jurgen L Kacprzak ◽  
Ramon Chvojka
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Methyl Mercury ◽  
Total Mercury ◽  
Inorganic Mercury ◽  
Flameless Atomic Absorption ◽  
Flameless Atomic Absorption Spectroscopy ◽  
The Difference

Abstract A method for the concurrent determination of methyl mercury and inorganic mercury by flameless atomic absorption spectroscopy (AAS) is described. Fifty-seven samples of juvenile black marlin fish were analyzed for inorganic and methyl mercury, and total mercury was calculated by addition of the 2 values. The sensitivity of the method was estimated to be 0.029 μg for inorganic mercury and 0.033 μg for methyl mercury. The detection limit of the method was about 0.02 μg inorganic mercury or methyl mercury and the error of the method was found not to exceed 10% for samples giving about 10% deflection on the absorbance scale. Samples from the same fish were analyzed by a commonly accepted flameless AAS method for the determination of total mercury. When the results for total mercury from the 2 methods were statistically compared, using a paired t-test, the difference between the results obtained by the 2 methods was found to be insignificant at the 95% confidence level.

Determination of Submicrogram Amounts of Mercury in Standard Reference Materials by Flameless Atomic Absorption Spectrometry

1972 ◽  
Vol 55 (6) ◽  
pp. 1339-1344
Author(s):  
Theodore C Rains ◽  
Oscar Menis
Keyword(s):  
Atomic Absorption ◽  
Reference Materials ◽  
Organic Materials ◽  
Absorption Spectrometry ◽  
Standard Reference Materials ◽  
Absorption Method ◽  
Absorption System ◽  
Flameless Atomic Absorption ◽  
Flameless Atomic Absorption Spectrometry

Abstract In a study of the flameless atomic absorption method for the determination of nanogram amounts of mercury in organic materials, the technique was improved to provide greater precision and accuracy. The loss of mercury during the digestion of organic materials with nitric, sulfuric, and perchloric acids is prevented by controlled heating and a packed refluxing column. The reduction and absorption system was simplified by using a heated absorption cell which alleviates the interference of volatile vapors. This method has been applied to the determination of mercury in NBS Standard Reference Materials of orchard leaves, liver, and coal, and the results were compared with results obtained with 2 other analytical methods.

Dry Ashing, Hydride Generation Atomic Absorption Spectrometric Determination of Arsenic and Selenium in Foods

1982 ◽  
Vol 65 (3) ◽  
pp. 647-650 ◽  
Author(s):  
Gerard K H Tam ◽  
Gladys Lacroix
Keyword(s):  
Detection Limit ◽  
Atomic Absorption ◽  
Reference Materials ◽  
Hydride Generation ◽  
Spectrometric Method ◽  
Flameless Atomic Absorption ◽  
Dry Ashing ◽  
Atomic Absorption Spectrometric ◽  
Certified Values

Abstract A dry ashing, flameless atomic absorption spectrometric method was evaluated to determine arsenic and selenium in foods. Samples were dry-ashed with Mg(N03)2-MgO and dissolved in HC1. Selenate was reduced to selenite by boiling in 4N HC1, and arsenate to arsenite by treatment with KI. Hydrides of arsenic and selenium were generated by the addition of NaBH4 and were swept by nitrogen and hydrogen into a thermally heated silicate tube furnace. The detection limit was about 5 ppb for each element based on a 10 g sample. Analytical results obtained for several samples of NBS reference materials agreed with the certified values. The procedure was evaluated by another laboratory and results were satisfactory.

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