GB/T 1878-1995 《Phosphate rock and concentrate--Determination of iodine content--Spectrophotometric andspecific ion electrode methods》 Related products

This standard specifies the method for the determination of iodine content in phosphate rocks and phosphate concentrates by iodine blue Spectrophotometric method, spectra-trophotometry and ion selective electrode method, which is suitable for the detection of iodine content greater than 0.001%. After the sample is acidified, the Miscellaneous interfering ions are separated by cation exchange Resin, and then the blue compound is formed by iodine ions and starch. Absorbance measurement at specific wavelengths is used to determine the iodine content. This standard provides detailed reagent configuration, operation steps and Measuring methods, which are suitable for the mass detection and analysis of phosphate rocks and phosphate concentrate products.