高等学校化学学报 ›› 1988, Vol. 9 ›› Issue (10): 1080.
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字明显, 刘海澜, 赵青岚
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Zi Mingxian, Liu Hailan, Zhao Qinglan
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摘要: 文献报道的磷砷测定,需分两步进行[1~3]。作者在实验中发现,磷砷(Ⅴ)与钼酸铵及抗坏血酸作用,形成两种具有相似吸光特性的钼蓝,但生成速率常数有差异。据此,本文提出了用比例方程法[4]同时测定两组分的含量。
关键词: 速差动力学法, 比例方程法, 微量磷砷的测定
Abstract: The article describes a method of simultaneous determination of micro phosphorus and arsenic by differential reaction-rate method. The proportional coefficients of K3min(P),K3min(As), K9min(P) and K9min(As) in solutions containing 0.3755mol·L-1 of sulphuric acid and 0.4% ammonium molybdate at 65℃ are reported. The method described is suitable for simultaneous determination of phosphorus and arsenic in a ratio of (P:As) more than 1.5. The relative error and relative standard deviation are within 1.0%.
Key words: Differential reaction-rate method, A method of proportional equation, Determination of micro phosphorous and arsenic
TrendMD:
字明显, 刘海澜, 赵青岚. 速差动力学比例方程法同时测定微量磷砷. 高等学校化学学报, 1988, 9(10): 1080.
Zi Mingxian, Liu Hailan, Zhao Qinglan . Simultaneous Differential Reaction-Rate Determination of Micro Phosphorus and Arsenic by the Method of Proportional Equations. Chem. J. Chinese Universities, 1988, 9(10): 1080.
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http://www.cjcu.jlu.edu.cn/CN/Y1988/V9/I10/1080