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酸溶磷钒钼黄比色法测定磷,当试样含有机物质时,制备成硝酸溶液后显有机色素黄色,干扰测定。为了消除此影响,普遍采用灼烧除去有机物质。但灼烧法手续麻烦,尤其遇到有个别样品在制备成硝酸溶液后才看到有色素,必须重新称样灼烧。为了从速消除影响,我们试验了以活性炭吸附消除有机色素干扰的简易方法。 一、主要试剂 活性炭:粉状,分析纯。
Acid phosphoric acid vanadium molybdenum yellow colorimetric determination of phosphorus, when the sample contains organic substances, the preparation of nitric acid solution was organic yellow, interference determination. In order to eliminate this effect, the general use of burning to remove organic matter. However, the burning method of trouble, especially in the face of individual samples in the preparation of nitric acid solution to see the pigment, you must re-sample burning. In order to eliminate the influence from the speed, we tested a simple method to eliminate organic pigment interference by activated carbon adsorption. First, the main reagent activated carbon: powder, analytical grade.