摘要
对柠檬酸稀土饲料添加剂生产中的酸度、原料比、温度、沉淀条件等进行了研究．经测定，有机稀土饲料添加剂中稀土氧化物的含量为４０．７％（＞３５％），对动物有害的元素Ｐｂ，Ｈｇ，Ｃｄ，Ａｓ的含量分别小于２０，０．５，１．０，３．５μｇ／ｇ．对动物的急性毒理实验及蓄积性实验证明，该产品无毒。
Acidity,proportion of raw materia ls,temperature and condi tion of percipitate in the production of citric acid rare earth fodde r filler a re analysed in this article.The measured results indicate that the amount of RE 2O 3(RE,the code of the element of rare earth) is 40.7%(>35%) ,and the a mounts of some poisonous elements are respectively Pb<20 μ g/g,Hg<0.5 μg/g,Cd<1.0 μg/g,As<3.5 μg/g The product proves to be poi sonousl ess and without remains through tests of animal acute toxicological ex periment and accumulation experiment.
出处
《烟台师范学院学报（自然科学版）》
1999年第2期144-147,共4页
Yantai Teachers University journal(Natural Science Edition)
