a new and simple method followed by atomic absorption spectrometry has been developedfor indirect determination of ascorbic acid (aa). the proposed method was based on the oxidationof aa to dehydroascorbic acid with cu2+cation(200mgl-1)in an ammonium thiocyanatesolution atph2.4. aa reduces cu2+to cu+followed by the precipitation of cu+ with scn-. then, the excess ofcu2+in the solution was measu...

Electrothermal atomic absorption spectrometry has five major advantages for measurements of trace metals in biological materials, in comparison to measure­ ments by conventional flame atomic absorption analysis: (1) Trace metal contami­ nation is minimized by avoidance of preliminary chemical extractions and addi­ tions of reagents; (2) Sample volumes are small (1 to 50 /*1). The entire sample ...

a sensitive, selective and effective ionic liquid-based single drop microextraction technique was developed by using ionic liquid, 1-hexyl-3-methylimidazolium hexafluorophosphate, c6mimpf6, coupled with electrothermal atomic absorption spectrometry (etaas) for the determination of copper and silver in environmental samples. dithizone was used as chelating agent. several factors that influence t...

(7) L’vov, B. V. Spectrochim. Acfa, Pafl B 1078, 338, 153-193. (8) Hageman, L. R.; Nlchols, J. A.; Viswanedham, P.; Woodriff, R. Anal. Chem. 1070, 51, 1406-1412. (9) Chakrabartt, C. L.; Wain, C. C.; Hamed, H. A.; Bartels, P. C. Anal. Chem. 1081, 53, 444-450. (IO) Barnard, T. Anal. Chern. 1070, 51, 1172A-1178A. (11) Siemer, D. D.; Baldwln, J. M. Anal. Chem. 1080, 52, 295-300. (12) L’vov, B. V. “...

Total diet sample/Elements/Atomic absorption spectrometry/Element correlation Total diet samples were collected from two urban areas in Japan, Sapporo and Kyoto, during the period from 1967 to 1968. The samples, ashed by dry-ashing and acid-digestion, were analyzed for elements by atomic absorption spectroscopy with the flame and electrothermal atomization. Average daily intake found in the two...

In this work, tungsten coil (W-Coil) devices are used as atomizers for electrothermal atomization atomic absorption spectrometry (ETAAS), electrothermal atomization laser excited atomic fluorescence spectrometry (ETA-LEAFS), and electrothermal vaporization inductively coupled plasma atomic emission spectrometry (ETV-ICP-AES). For most cases in ETAAS and ETA-LEAFS, limits of detection (LODs) usi...

The capabilities and applicability of the radiotracer technique for methodological studies in hydride generation and electrothermal atomic absorption spectrometry are discussed and demonstrated by using several selected examples. It is shown that, for studying chemical and physico-chemical aspects of atomic absorption spectrometric methods, the radiotracer technique is superior to other techniq...

Aluminum has been implicated in the etiology of the progressive dialytic encephalopathy. Data are presented on samples taken from patients on maintenance hemodialysis, during treatment. Aluminum was determined by electrothermal atomic absorption spectroscopy. Hemodialysis had no significant effect on serum aluminum concentrations, which ranged from 27 to 254 micrograms of Al per liter (1.00 to ...