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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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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(5 ㎍/mL) to 100 ng/mL bismuth solution, the temperatures could be raised from 5OO℃ to 1,300℃ for the charring and from 2,000℃ to 2,200℃ 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 3-25 ㎍/mL. And several materials were examined as an auxiliary modifier. The mixed solution of 1 ㎍/mL palladium and 200 ㎍/mL nickel have raised the temperatures as with 5 ㎍/mL palladium only. The maximum absorbance of bismuth was shown in the nickel concentration range of 100-300 ㎍/mL in 1 1 ㎍/mL 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.
목차
Abstract
1. Introduction
2. Experiment
3. Results and Discussion
Reference
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