A Study was made for the purpose of improving method of determining thiocyanate in ferilizers.The report shows the two color systems of both Cu-Py-SCN/CHCl3 complex in organic phase and Fe-SCN complex in re-extract wa...A Study was made for the purpose of improving method of determining thiocyanate in ferilizers.The report shows the two color systems of both Cu-Py-SCN/CHCl3 complex in organic phase and Fe-SCN complex in re-extract water phase may be used to determine thiocyanate 0.005% above in fertilizers.The precision and accuracy of the methods are all satisfactory within attainable range.The concentration ranges of SCN- for Berr’s law are respectively following as:（A）1-20 mg/L（organic phase）,（B）0.1-8 mg/L（water phase）.After a lot of sample treatment experiments and recovery of SCN- tests,it recommended that the true amount of SCN- in fertilizers could be determined in alkaline solution medium.展开更多
文摘A Study was made for the purpose of improving method of determining thiocyanate in ferilizers.The report shows the two color systems of both Cu-Py-SCN/CHCl3 complex in organic phase and Fe-SCN complex in re-extract water phase may be used to determine thiocyanate 0.005% above in fertilizers.The precision and accuracy of the methods are all satisfactory within attainable range.The concentration ranges of SCN- for Berr’s law are respectively following as:（A）1-20 mg/L（organic phase）,（B）0.1-8 mg/L（water phase）.After a lot of sample treatment experiments and recovery of SCN- tests,it recommended that the true amount of SCN- in fertilizers could be determined in alkaline solution medium.
