摘要
利用气相分子吸收光谱仪,通过单因素实验法,探讨CaCl_2浸提液的浓度、浸提时间对土壤中的硝酸盐氮测定的影响。实验结果表明,浸提液的浓度对土壤中的硝酸盐氮测定有重要影响,浸提时间对测定值影响不显著;当CaCl_2浓度为2mol·L~(-1),浸提时间为40min的条件下,检测方法的精确度和准确度均可达到检测要求。
The effect of concentration and leaching time of calcium chloride extract on nitrate nitrogen determination in soil was discussed by means of single factor experiment by gas phase molecular absorption spectrometer.The experimental results show that the concentration of leaching solution has an important effect on the determination of nitrate nitrogen in soil, and the leaching time has no significant effect on the measured value. When the concentration of calcium chloride is 2 mol·L~(-1) and the leaching time is 40 min, the precision and accuracy of the detection method can meet the detection requirements.
引文
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