乙醇增敏－电感耦合等离子体原子发射光谱(ICP-AES)法测定土壤中的全硼

采用电感耦合等离子体原子发射光谱法（ICP-AES)测定土壤中的全硼，具有测定范围宽，精密度高，测定速度快等优点，但其检出限较高，文章选择乙醇作增敏剂，降低仪器检出限，实现高中低含量样品的同时分析测定。实验发现当乙醇含量为5%时，雾化效率最佳，原子线B208.893 nm，B208.959 nm的灵敏度分别增强了21.2% 和18.7% ；采用HF-HCl-HNO3消解样品，甘露醇作保护剂，甘露醇的加入可有效解决样品消解过程中硼挥发所导致的测定结果偏低，精密度差等问题。按照本实验方法对国家标准物质及实际土壤样品进行全硼的分析测定，测定结果相对标准偏差（RSD，n=11）为0.56%～2.14%，相对误差为-2.8%～1.6%。加标回收率在 96.8%~104.6% 之间 ，可满足日常分析要求。

Determination of Boron in Soil by Inductively coupled plasma atomic emission spectrometry with Ethanol Sensitization

The determination of total boron in soil by inductively coupled plasma atomic emission spectrometry (ICP-AES) has the advantages of wide determination range, high precision and fast determination speed, but its detection limit is high.In this paper, ethanol was selected as the sensitizer to reduce the detection limit of the instrument and realize the simultaneous analysis and determination of high, middle and low content samples.It was found that when the ethanol content was 5%, the atomization efficiency was the best, and the sensitivity of B208.893 nm and B208.959 nm were increased by 21.2% and 18.7%, respectively. The addition of mannitol can effectively solve the problem of low determination result and poor precision caused by boron volatilization during sample digestion.According to this method, total boron was determined for national standard materials and actual soil samples. The relative standard deviation (RSD, n=11) was 0.56%~2.14%, and the relative error was -2.8%~1.6%. The recoveries were 96.8%~104.6%.Can meet the daily analysis requirements.