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首页> 外文期刊>The Analyst: The Analytical Journal of the Royal Society of Chemistry: A Monthly International Publication Dealing with All Branches of Analytical Chemistry >Development of a wide bore flow through microwave digestion device for the determination of trace metals in soil
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Development of a wide bore flow through microwave digestion device for the determination of trace metals in soil

机译：通过微波消解装置开发大口径流量测定土壤中痕量金属的方法

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摘要

A flow through microwave digestion device has been developed for the determination of Cd, Cr, Mn, Ni and Pb in soil by aqua regia extraction. This device differs from existing commercially available devices as it uses a double pumping action to replace the back pressure regulator traditionally used to achieve internal pressurisation. An acid front has also been included to overcome problems associated with the dilution of acid in samples due to dispersion. Recoveries between 95 and 105% of certified values were achieved with standard deviations of less than 4% for certified reference soil (BCR 143R). A sample throughput of 6 samples per hour was achieved in the optimised system. The performance of the device was tested by digesting real soil samples ground through a 250 μm sieve and slurried without the use of surfactants. A comparison of analytical performance for analysing real samples was made between the microwave flow method and a thermal method.
机译：已经开发了一种通过微波消解装置的流动装置，用于通过王水萃取来测定土壤中的Cd，Cr，Mn，Ni和Pb。该设备与现有的市售设备不同，因为它使用双重泵送作用来代替传统上用于实现内部增压的背压调节器。还包括酸前沿以克服与由于分散而导致样品中酸稀释有关的问题。对于认证参考土壤（BCR 143R），可实现95％到105％的认证值回收率，标准偏差小于4％。在优化的系统中，每小时可获得6个样品的样品通量。通过消解通过250μm筛磨碎的真实土壤样品并在不使用表面活性剂的情况下制浆来测试设备的性能。在微波流动法和热法之间对用于分析真实样品的分析性能进行了比较。

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