一种分析铬铁中磷的方法

Method for analyzing phosphorus in ferrochromium

Abstract

The invention discloses a method for analyzing phosphorus in ferrochromium, which can be used for obtaining a phosphorus element concentration value with high accuracy. The method comprises the following steps: (1) smelting sodium peroxide and a ferrochromium sample, adding concentrated hydrochloric acid and distilled water, and shaking uniformly to form a sample digestion solution; (2) measuring the spectral intensity of element phosphorus in the sample digestion solution obtained in the step (1) at 177.4nm by using an inductively coupled plasma atomic emission spectrometer, in order to obtain a P intensity value; (3) preparing a standard working curve solution, namely, directly smelting five standard ferrochromium samples, namely, BH03103, YSBC286212010, GSB0315622003, YSBC2565193 and GSB20115, according to the step (1) to form five standard working solutions; measuring the spectral intensity of the phosphorus element in the sample digestion solution at 177.4nm by using the inductively coupled plasma atomic emission spectrometer, in order to obtain 5 corresponding P intensity values, and deducing the concentration value of the P element in the sample digestion solution. The method disclosed by the invention has the advantages of high precision and high speed in large-batch detection.
本发明公开了一种能得到磷元素浓度值的精确度很高的分析铬铁中磷的方法,(1)将过氧化钠和铬铁样品熔融后加浓盐酸和蒸馏水,然后摇匀形成样品消解溶液;(2)根据步骤(1)得到的样品消解溶液运用电感耦合等离子体原子发射光谱仪来测定样品消解溶液中磷元素在177.4nm处光谱强度,得到P强度值;(3)配置标准工作曲线溶液:按(1)步骤直接熔融下列五个标准铬铁的样品形成5个标准工作溶液,BH0310-3、YSBC28621-2010、GSB03-1562-2003、YSBC25651-93、GSB2011-5;并运用电感耦合等离子体原子发射光谱仪来测定样品消解溶液中磷元素在177.4nm处光谱强度,得到5个对应的P强度值,由这5个P强度值可以推倒出样品消解溶液P元素的浓度值。本发明的优点是:大批量检测的时候,精度高,速度快。

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