植物中多元素测定的微波消解前处理技术

Technology of the Microwave Digestion for Determination of Multi elements in Plants

中文关键词:  微波消解技术  原子吸收法  单频直流等离子体原子发射光谱  茶叶  中药  多元素

英文关键词:microwave digestion  flame atomic absorption Spectrometers  direct current plasma-atomic emission spect romet ry  tea-leaves  traditional Chinese medicine  Multi-elements

中文摘要:

      植物中多元素同时测定的前处理采用微波消解技术,利用原子吸收法和单频直流等离子体原子发射法测定茶叶和中药中的Ba、Ca、Cu、Fe、K、Mg、Mn、Na、Sr、Ti和Zn.用四种国家标准参考样品进行考察,结果表明这是一项安全可靠且快速无污染的技术.

英文摘要:

      The use of microwave digestion in the determination of sample preparation of tea leaves and traditional Chinese medicine samples for Ba、Ca、Cu、Fe、K、Mg、Mn、Na、Sr、Ti and Zn by AAS (flame atomic absorption Spectrometers) and DCP AES (direct current plasma-atomic emission spectrometry) is described.Depending on the plant tissue and the element to be determined, samples are digested either with HNO₃ and HCL or with HNO₃, HF and H₂O₂ in closed Teflon (PTFE) vessels in a microwave oven. The compostion of reagents and the analytical were optimized for the determination of multi elements. The method was tested using four different reference samples. The microwave digestion is a rapid and reliable technique for the decomposition of plant samples using FAAS and DCP AES. It was found that the method is strongly dependent on the type of plant tissue and elements to be determined.