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探讨利用M g2+与变色酸2R显色体系测定湿法磷酸中镁的可能性。结果表明,镁含量在0~80μg/100mL内符合比尔定律,方法检出限20μg/100 mL。标准工作曲线线性回归方程A=0.0030C+0.0013,相关系数r=0.99985。
To explore the use of M g2 + and chromogenic acid 2R colorimetric system for the determination of magnesium in wet-process phosphate. The results showed that the Beer’s law was obeyed in the range of 0 ~ 80μg / 100mL and the limit of detection was 20μg / 100mL. Standard working curve linear regression equation A = 0.0030C +0.0013, correlation coefficient r = 0.99985.