- P-ISSN 1225-0163
- E-ISSN 2288-8985
- P-ISSN1225-0163
- E-ISSN2288-8985
- SCOPUS, ESCI, KCI
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Matrix Modification for Graphite Furnace Atomic Absorption Spectrophotometric Determination of Volatile Elements(III) Trace Bismuth
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1995, v.8 no.4, pp.435-442
Kim,
Y., Choi,
J., &
Kim,
Y.
(1995). Matrix Modification for Graphite Furnace Atomic Absorption Spectrophotometric Determination of Volatile Elements(III) Trace Bismuth. , 8(4), 435-442.
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Abstract
A matrix modification was studied for the determination of trace bismuth in water samples by graphite furnace atomic absorption spectrophotometry. The type and quantity of modifiers as well as the use of auxiliary modifiers were investigated to realize the efficient modification. Palladium was chosen as a single modifier. By the addition of palladium(<TEX>$5{\mu}g/mL$</TEX>) to 100 ng/mL bismuth solution, the temperatures could be raised from <TEX>$500^{\circ}C$</TEX> to <TEX>$1,300^{\circ}C$</TEX> for the charring and from <TEX>$2,000^{\circ}C$</TEX> to <TEX>$2,200^{\circ}C$</TEX> for the atomization as well as the sensitivity and reproducibility were improved. The absorbance of bismuth was maximum and not changed in the range of Pd <TEX>$3-25{\mu}g/mL$</TEX>. And several materials were examined as an auxiliary modifier. The mixed solution of <TEX>$1{\mu}g/mL$</TEX> palladium and <TEX>$200{\mu}g/mL$</TEX> nickel have raised the temperatures as with <TEX>$5{\mu}g/mL$</TEX> palladium only. The maximum absorbance of bismuth was shown in the nickel concentration range of <TEX>$100-300{\mu}g/mL$</TEX> in <TEX>$1{\mu}g/mL$</TEX> palladium modified system. With such optimum conditions, the trace amount of bismuth in several water samples could be determined by a calibration curve method, and good recoveries were also obtained.
- keywords
- Electrothermal atomic absorption spectrophotometry, Bismuth, Matrix modification, Palladium modifier
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