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离子选择电极(Ion Sellective Electrode简称ISE)在法医毒物分析方面作一综述如下。一、氟化物的测定:用LaF_3制成氟电极被广泛用于毒物中氟化物的分析。中毒的食物、呕吐物、胃内容用滤膜渗析法提取分离,脏器用高温干灰化法,残渣用蒸馏水溶解、过滤、滤液供检,新鲜尿液可直接测定。方法:取1ml0.5MpH7.0的柠檬酸盐缓冲液于一系列标号烧杯中,加1ml试样,用氟电极和饱和甘汞参比电极测各试液的电位,最后结合标准曲线推算出所含氟化物浓度。人指甲中含氟量:可先用氯酸钾和氢氧化钠与指甲在马弗炉内共熔,熔融物用水溶解,pH调至5～5.5,
Ion selective electrode (Ion Sellective Electrode referred to as ISE) in the forensic analysis of toxicological make a summary are as follows. First, the determination of fluoride: made of LaF_3 fluorine electrode is widely used in toxic fluoride analysis. Toxic food, vomit, stomach content by dialysis dialysis extraction, organ with high temperature dry ashing, the residue dissolved in distilled water, filtered, the filtrate for testing, fresh urine can be directly measured. Method: Take 1ml0.5MpH7.0 citrate buffer in a series of labeled beakers, add 1ml sample, with fluoride electrode and saturated calomel reference electrode test the potential of the test solution, and finally with the standard curve calculated containing Fluoride concentration. Nail fluoride content: You can use potassium chlorate and sodium hydroxide and nails in the muffle furnace melting, the melt dissolved in water, pH adjusted to 5 ~ 5.5,