含砷土壤试样中磷的测定
Yunnan Metallurgy（2015）
Abstract
《土壤总磷的测定》(HJ632-2011)[1]中,该方法在测定磷含量时未提及砷的干扰.利用砷在五价时与钼酸盐反应,但在三价时不干扰测定的特点,通过加入硫代硫酸钠还原砷的试验,明确了该方法对消除砷干扰的有效性,并对试验结果进行讨论.
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