摘要
测定地质样品中钒、钼、铬、镉、铜、铅、锌等7种微量元素,之前采用封闭密封罐消解法溶解地质样品,虽然能将样品充分消解,但是耗时较长,为节省检测耗时,此方法研究采用特氟龙消解杯(PFA)对样品进行消解,建立了一种使用硝酸、氢氟酸、高氯酸消解体系来熔解地质样品的前处理方法,采用Re元素标准溶液作为内标对样品进行测定,对4份土壤标准样品的测定结果均符合要求,相对标准偏差在0.55％～8.6％,方法检出限在0.02～2.0 mg/kg范围内,相关系数皆大于0.999 8.
Abstract
Seven trace elements,such as vanadium,molybdenum,chromium,cadmium,copper,lead and zinc,were determined in geological samples.Before,the geological samples were dissolved by closed sealed pot digestion method,although the samples could be fully digested,it took a long time.In order to save the time of detection,this method studied the determination of seven elements in geological samples,and the samples were digested by Teflon digestion cup(PFA).A pretreatment method of dissolving geological samples with nitric acid,hydrofluoric acid and perchloric acid digestion system was established.Re element standard solution was used as internal standard to determine the samples.The determination results of four soil standard samples all met the requirements,the relative standard deviation was 0.55％～8.6％,the detection limit of the method was 0.02～2.0 mg/kg,and the correlation coefficients were all greater than 0.999 8.
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