利用光纤压力自控密闭微波消解系统对土壤和植株样品中重金属元素测定的影响进行了研究,确立了样品消解试剂、微波消解条件及样品预处理方法.结果表明,该方法与常压湿法消解相比,具有样品消解时间短、消解试剂用量少、样品污染小等特点,是准确可靠的土壤及植株样品中重金属元素检测样品消解处理方法.

An optical fibre,self-pressure-controlled,hermetic micro-wave heating system was used for aicd-digestion of agricultural samples,such as soil and plants,for the determination of heavy metals in such samples.Various factors influential to the efficiency of sample digestion,including the acids used for the digestion,parameters and conditions of micro-wave heating,methods necessary for pretreatment of sample and etc,were studied and optimized.As compared with the wet digestion of sample under normal pressure,the method described in this paper had the distinguishing features of less time required for digestion of sample,much smaller amounts of acid or solvent required for digestion of sample,less contamination with the sample,thus leading to more precise and accurate analytical results.