• 분석과학
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• 제7권4호
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• pp.461-469
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• 1994

매달린 수은전극에서 N-Benzoylphenylhydroxylamine을 리간드로 사용하여 흡착벗김 전압전류법으로 PIPES 완충용액에서 극미량의 바나듐을 정량하였다. 이 때 흡착전위 +0.15V, 흡착시간 10초에서 바나듐의 검정곡선은 $10{\sim}70{\mu}g/L$ 범위에서 직선성을 나타내었다. 그리고 다른 금속 이온의 영향은 없었다.

• 분석과학
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• 제20권1호
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• pp.55-60
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• 2007

A sensitive technique for the determination of trace Cu(II) in various samples after the column preconcentration by adsorbing its N-benzoylphenylhydroxylamine (BPHA) onto benzophenone was developed. Several experimental conditions such as the pH of the sample solution, the amount of chelating agent, the amount of benzophenone, and the flowrate of sample solution and so forth were optimized. The interfering effects of diverse concomitant ions were investigated. Fe(III) and $CN^-$ interfered with more seriously than any other ions. However, the interference by these ions could be overcome sufficiently by adjusting the added volume of 0.01M BPHA to 10 mL. The dynamic range, the correlation coefficient ($r^2$) and the detection limit obtained by this proposed technique were 5.0~120 ng/mL, 0.9974, and 2.1 ng/mL, respectively. For validating this proposed technique, the aqueous samples (stream water, reservoir water, and wastewater), the plastic sample and the diluted brass sample were used. Recovery yields of 93~102% were obtained. These measured data were not different from ICP-MS data at 95% confidence level. This method was also validated by the rice flour CRM (normal, fortified) samples. Based on the results from the experiment, it was found that this proposed technique could be applied to the determination of Cu(II) in various real samples.