ICP-AES测定超微木耳粉中微量元素及扫描电镜观察

Determination of Trace Elements in Ultrafine Agaric by ICP-AES and Observation by SEM

主要研究电感耦合高频等离子体发射光谱法测定超微黑木耳粉多种微量元素的方法试验,通过方法试验确认采用湿法酸消解制备样品,硝酸∶高氯酸=10∶1(体积比),120℃恒温消化溶解,酸度控制<10%,满足ICP—AES测定的要求。该方法具备样品处理方法简单、快速、经济等优点。经检测国家标准物质GBW07602验证,其方法的准确度在-1.12%～6.15%之间,精密度在0.41%～5.69%之间。试验数据证明该方法是木耳中微量元素检测简便有效的方法之一。同时应用扫描电子显微镜进行超微黑木耳粉表面结构测定,结合黑木耳外在和内在的相关性为黑木耳开发应用研究提供科学探讨的新途径。

The simultaneous determination of trace elements in ultrafine agaric by inductively coupled plasma atomic emission spectrometry （ICP—AES）. The way confirmed through experiments using wet acid digestion sample preparation. Nitric acid： perchloric acid=10∶1（volume ratio）. The samples digestion dissolved at 120 ℃ constant temperature. The requirements of determination by ICP-AES can be satisfied at acidity controled less than10 %. The method is with samples treatment simple, rapid, economic and other advantages. Nation standard materials GBW07602 detected by authentication. Its degree of accuracy is at between-1.12 % and 6.15 %. The precision is at between 0.41 % and 5.69 % . Experimental data shows that the method of detection of trace elements in agaric are simple and effective methods. At the same time, the surface structure of ultrafine agaric powder examined by application of scanning electron microscope. The method studied combination of external and internal relevance of agaric for the development and application of auricularia to provide scientific research to explore new way.