微波消解-电感耦合等离子体发射光谱法测定土壤有效硼

探究用微波消解进行前处理与电感耦合等离子体发射光谱仪(ICP-OES)检测相结合的方法，通过实验对消解时间、消解温度、升温时间及测定过程中铁共存干扰元素、土壤的pH进行了研究。在ICP-OES光谱仪的最优工作条件下，谱线249.773 nm的硼灵敏度高、峰形好，测定结果表明，当样重为10.00 g，浸提液体积为20 mL时，方法检出限为0.005 mg/kg，测定下限为0.020 mg/kg，精密度和准确度满足检测要求，此法适用于批量土壤有效硼的测定。

Determination of available boron in soil by microwave digestion-Inductively coupled plasma emission spectrometry

To explore the combination of microwave pre-processing with Inductively coupled plasma emission spectrometry （ICP-OES）in the detection of soil available boron，the digestion time，digestion temperature，temperature rise time， ferrum（Fe）co-existing interference elements and soil pH in the determination process were studied. Under the optimum working conditions of ICP-OES spectrometer，the spectral line boron（B）249.773 nm had high sensitivity and good peak shape. The results showed that the detection limit was 0.005 mg/kg when the sample weight was 10.00 g and the volume of extraction was 20 mL，the lower limit of determination was 0.020 mg/kg，and the precision and accuracy could meet the detection requirements. This method is suitable for the determination of available boron in batch soil.