水晶発振検出器を用いる微量シアン化物イオンの簡易定量法

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Simplified determination of a minute amount of cyanide using a piezoelectric quartz crystal. Toshiaki NOMURA and Osamu HATTORI (Department of Chemistry, Faculty of Science, Shinshu University, 3-1-1, Asahi, Matsumoto-shi, Nagano) In the presence of hydrogen peroxide cyanide reacted with a gold electrode of a quartz oscillator to form cyano gold complex, and the dissolution of the gold resulted in the frequency change of the quartz oscillator. A minute amount of cyanide in solution could be determined by this method. Cyanide sample solution (50 ml, pH 10, 30°C) containing 0.3 % hydrogen peroxide was flowed out on the both gold electrodes of the quartz oscillator at the rate of 2.50 ml / min with a peristaltic pump. After 20min, the quartz oscillator was washed with water and acetone, and dried by flowing nitrogen gas, and the change of the frequency of the oscillator, F (Hz), was measured. The calibration curve was linear over the range of (2.0 × 10^<-7>〜4. 0 × 10^<-6>) M, and the relationship was given by an equation, [CN^-] = (F / 19.2) × 10^<-7> M. The standard deviation was 11.7 Hz (3.5%) for 5 determinations of 2.0 × 10^<-6> M cyanide. (Received Sept. 8, 1980)
社団法人日本分析化学会の論文
1981-03-05