摘要
研究经不同方法脱毒处理后的橡胶籽分别采用异烟酸-吡唑啉酮分光光度法和加入外源β-葡萄糖苷酶的异烟酸-吡唑啉酮分光光度法检测其氰化物含量。结果表明:采用异烟酸-吡唑啉酮分光光度法检测出的氰化物含量较低或不存在,而加入外源β-葡萄糖苷酶的异烟酸-吡唑啉酮分光光度法检测出的氰化物含量明显高于单独采用异烟酸-吡唑啉酮分光光度法的检出值。再对加入外源β-葡萄糖苷酶的异烟酸-吡唑啉酮分光光度法的应用条件进行优化后得到最优条件为浸泡时间3.35 h、浸泡温度45.06℃、加酶量24.11 U/100 mL、浸泡pH 5.56。以上条件下,预测的氰化物含量为28.79μg/g,加标回收率为85.02%~92.04%,测定结果准确可靠。
This study investigated the determination of the residual cyanide content of rubber seeds detoxified by differentmethods by a spectrophotometric method using isonicotinic acid-pyrazolone with and without exogenousβ-glucosidasepretreatment.The results showed that cyanide was undetectable or detectable at a level lower than the actual one by thespectrophotometric method without exogenousβ-glucosidase pretreatment,while it was detected at a significantly higherlevel with the sample pretreatment.The optimized pretreatment conditions were3.35h soaking at45.06℃and pH5.56with24.11U/100mL ofβ-glucosidase added,under which,the predicted cyanide content of rubber seeds was28.79μg/g.Therecovery of spiked samples ranged from85.02%to92.04%.The proposed method was accurate and reliable.
作者
张烨
王珂
刘石生
ZHANG Ye;WANG Ke;LIU Shisheng(College of Food Science, Hainan University, Haikou 570228, China;Key Laboratory of Tropical Biological Resources, Ministry of Education, Hainan University, Haikou 570228, China)
出处
《食品科学》
EI
CAS
CSCD
北大核心
2017年第14期290-296,共7页
Food Science
基金
国家自然科学基金地区科学基金项目(31460407)