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li yong xin yan fa ti qu fa jiao gu an suan de yan jiu di yi bao jie jing shi yan
Pages: 15-25+39
Year: Issue:  4
Journal: FAJIAO KEJI TONGXUN

Keyword:  谷氨酸钠谷氨酸锌发酵液结晶锌离子盐母液溶解度锌盐残存量提取;
Abstract: 谷氨酸锌C5H7O4NZn·2(1/2)H2O,难溶丁水,随溶液PH值的改变溶解度差异甚大;PH6.0=1.5×10-3M,PH10.1=1×10-1M,溶于强酸性溶液,不溶于强硷性溶液。谷氨酸与锌离子结合的反应中和点是PH=6.3;投锌比例GA:Zn++=1:1.15(M)。菌体母液的残存量GA=0.3g/dl;Zn++=0.33g/dl。从谷氨酸锌制备谷氨酸结晶的PH=2.4±0.2,GA=97%以上。锌盐母液的残存量GA=3~4g/dl;Zn++=6~7g/dl。NaGA=99.4%;T=93%(X=420mu,l=1Cm,C=30),Zn++<1.5 mg/kg(1.5PPm);纸层析一个斑点。
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