Eppelsheim C, Aubeck R, Hampp N, Bräuchle C
Institut für Physikalische Chemie, Universität München, Germany.
Analyst. 1991 Oct;116(10):1001-3. doi: 10.1039/an9911601001.
Ion-selective poly(vinyl chloride) membrane electrodes for the opium alkaloids papaverine and ethaverine are presented. The electrode membranes contain ion pairs of the alkaloids with the anionic counter ion tetraphenylborate. The detection limits for all electrodes were approximately 2 x 10(-6) mol dm-3 at pH 5.0 in 100 mmol dm-3 buffered solutions and the measured slopes were close to the values theoretically expected. The selectivity coefficient observed for the ethaverine-tetraphenylborate electrode is 10(-1.1) with respect to papaverine. The suitability of the membranes for single-use electrodes is discussed.
本文介绍了用于鸦片生物碱罂粟碱和乙基罂粟碱的离子选择性聚氯乙烯膜电极。电极膜含有生物碱与阴离子抗衡离子四苯硼酸盐的离子对。在pH 5.0的100 mmol dm-3缓冲溶液中，所有电极的检测限约为2×10(-6) mol dm-3，测量斜率接近理论预期值。乙基罂粟碱-四苯硼酸盐电极相对于罂粟碱的选择性系数为10(-1.1)。讨论了该膜用于一次性电极的适用性。
