摘要
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.
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/CHCl_3 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.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2004年第4期556-558,共3页
Chemical Research and Application
关键词
光度分析
硫氰酸盐测定
化肥
thiocyanate
fertilizer
colorimetric analysis
