原子荧光光谱法测定不同品种郁金中的砷含量

Determination of Arsenic Content in Different Varieties of Tulip by Atomic Fluorescence Spectrometry

摘要: 本文建立了一种以原子荧光光谱法测定不同种类的郁金中砷含量的方法。本文中主要对影响原子荧光测试的副高压、灯电流、载气流量和屏蔽气流量四项单因素进行筛选，并进行正交试验，确定最优条件为：负高压为300 V，灯电流为70 mA，载气流量为300 mL/min，屏蔽气流量为600 mL/min，其中对试验结果影响最大的为负高压，其次为灯电流强度。其次，分别讨论微波消解和加热消解两种前处理方法，确定微波消解为最佳方式。此外，经过对温郁金和广西郁金两种不同品种的郁金的砷测定比较，发现温郁金中砷的含量低于广西郁金，而这可能与环境中土壤砷含量的高低、使用含砷化肥或农药等有关。综上所述，使用微波消解–原子荧光光谱法可以高效准确地测定郁金香中砷的含量，因此可作为检测砷含量的一种可靠方法。

Abstract: In this paper, a method to determine the arsenic content of different kinds tulips by atomic fluo-rescence spectroscopy was established. Test the four single factors of auxiliary high voltage, lamp current, carrier gas flow and shielding gas flow, and according to the orthogonal experiment, the optimal condition is: negative high pressure is 300 V, lamp current is 70 mA, carrier gas flow is 300 mL/min, shielding gas flow is 600 mL/min. Among them, the most influential factor is auxiliary high pressure, then is the lamp current. Secondly, the two pre-treatment methods of microwave digestion and heating digestion are discussed respectively to determine the microwave digestion as the best way. In addition, after comparing the two different varieties of arsenic determination of Curcuma Wenyujin and Guangxi turmeric, it is found that the content of arsenic in Curcuma Wenyujin is lower than that of Guangxi turmeric, which may be related to the level of soil arsenic content in the environment and the use of arsenic-containing fertilizers or pesticides. To sum up, the content of arsenic in tulip fluorescence can be measured efficiently and accurately using microwave resolution-atomic fluorescence spectroscopy, and it can be used as a reliable method to detecting arsenic content.