葛根及其种植土壤中钼的单扫描极谱测定法

Determination of Trace Molybdenum in Radix Puerariae and Growth Soil by Single Sweep Polarography

目的建立一种新的测量葛根及其种植土壤中钼含量的方法。方法于2005年11月,在江西省上饶横峰葛基地种植区采集葛根及其所在地区的土壤,采用微波消解单扫描极谱法测定葛根及其种植土壤中钼元素的含量,并与原子吸收法测定结果进行比较、分析。结果该方法钼的一阶导数电流与钼的浓度的关系曲线的回归方程为:y=0.004+1000x;线性范围为0.010～1.0μg/ml,r=0.9990,其检出限为6.0×10-3μg/ml。加标回收率为98.0%～106.0%,RSD为2.2%～4.8%。该法与原子吸收法测定结果比较,经t检验,差异均无统计学意义(P>0.05)。结论采用单扫描极谱法测量土壤及葛根钼含量,具有结果准确可靠,方法简便快速等特点,值得推广。

Objective To develop a method to determine molybdenum in radix puerariae and the soil. Methods A method for determination of trace molybdenum in radix puerariae and the soil where it growth by single sweep polarography has been used. Results The linear range was 0.010-1.0μg/ml, r：0.9990, the detection limit was 6.0×10^-3μg/ml, the recovery rates were 98.0%-106.0%, RSD was 2.2%-4.8%. Conclusion This method is suitable for the determination of molybdenum in radix puerariae and the soil. The content of Mo in radix puerariae is related to that in the soil.