电感耦合等离子体质谱法测定蛋白胨4种微量元素
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摘要
目的建立电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry,ICP-MS)测定蛋白胨中Mn、Co、Cu、Mo微量元素的方法。方法样品经微波消解,冷却赶酸定容后,采用KED模式进行测定, Mn、Mo、Co、Sc分别以Sc、Rh、Cu以及Ge作为内标。结果 Mn、Co、Cu、Mo质量浓度在0～50μg/L范围内线性良好,r2均大于0.996,各元素检出限分别为1.65、0.06、0.21、1.11μg/L(n=10),精密度在1.86%～3.67%,加标回收在89%～94%之间。蛋白胨Mn、Co、Cu、Mo含量范围分别为0.3～8.6mg/kg,0.01～1.9 mg/kg, 0.07～3.4 mg/kg, 0.4～11.3 mg/kg。虽然元素含量跨度大,但大部分样品元素含量相对集中; 4种元素的平均含量分别为1.0、0.2、0.4、0.8 mg/kg,大部分蛋白胨Co、Cu含量高于平均值, Mn、Mo大部分样品均低于平均值。结论该方法操作简单、快速、灵敏,适合测定蛋白胨微量元素,本实验数据可为蛋白胨研究提供数据参考。
Objective To establish a method for determination of trace elements Mn,Co,Cu and Mo in peptone by inductively coupled plasma mass spectrometry(ICP-MS).Methods After microwave digestion,cooling,acidified and constant volume,the samples were determined by KED mode.Mn,Mo,Co,Sc was determined by Sc,Rh,Cu and Ge as internal standards.Results Mn,Co,Cu and Mo showed good linear relationships in the concentration range of 0-50 μg/L with r~2 greater than 0.996.The limits of detection of Mn,Co,Cu and Mo were 1.65,0.06,0.21 and 1.11 μg/L(n=10),respectively,the precision was 1.86%-3.67%,and the recovery was 89%-94%.The content of Mn,Co,Cu and Mo were 0.3-8.6 mg/kg,0.01-1.9 mg/kg,0.07-3.4 mg/kg,0.4-11.3 mg/kg,respectively.Although the element content span was large,most of the sample elements were relatively concentrated.The average content of 4 elements was 1.0,0.2,0.4 and 0.8 mg/kg,and the content of Co,Cu in most peptones was higher than the average values.The content of Mn,Mo was lower than the average.Conclusion This method is simple,rapid and sensitive,which is suitable for the determination of peptone trace elements.The experimental data can provide data reference for peptone research.
Objective To establish a method for determination of trace elements Mn,Co,Cu and Mo in peptone by inductively coupled plasma mass spectrometry(ICP-MS).Methods After microwave digestion,cooling,acidified and constant volume,the samples were determined by KED mode.Mn,Mo,Co,Sc was determined by Sc,Rh,Cu and Ge as internal standards.Results Mn,Co,Cu and Mo showed good linear relationships in the concentration range of 0-50 μg/L with r~2 greater than 0.996.The limits of detection of Mn,Co,Cu and Mo were 1.65,0.06,0.21 and 1.11 μg/L(n=10),respectively,the precision was 1.86%-3.67%,and the recovery was 89%-94%.The content of Mn,Co,Cu and Mo were 0.3-8.6 mg/kg,0.01-1.9 mg/kg,0.07-3.4 mg/kg,0.4-11.3 mg/kg,respectively.Although the element content span was large,most of the sample elements were relatively concentrated.The average content of 4 elements was 1.0,0.2,0.4 and 0.8 mg/kg,and the content of Co,Cu in most peptones was higher than the average values.The content of Mn,Mo was lower than the average.Conclusion This method is simple,rapid and sensitive,which is suitable for the determination of peptone trace elements.The experimental data can provide data reference for peptone research.
引文
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[3]Orak T,Caglar O,Ortucu S,et al.Chicken feather peptone:A new alternative nitrogen source for pigment production by,Monascus purpureus[J].J Biotechnol,2018:S0168165618300543.
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[6]张萍.酶解罗非鱼碎肉制备生化试剂蛋白胨的工艺研究[D].福州:福建农林大学,2009.Zhang P.Study on the preparation of biochemical reagent peptone by enzymatic hydrolysis of tilapia minced meat[D].Fujian:Fujian Agriculture and Forestry University,2009.
[7]许婷.孟鲁司特联合普米克令舒对支气管哮喘患儿细胞免疫、血清Ig E及痰液嗜酸性粒细胞的影响研究[J].中外医学研究,2014,(8):9-10.Xu T.Effect of montelukast combined with Pulmicort Respules on cellular immunity,serum Ig E and sputum eosinophils in children with bronchial asthma[J].Chin For Med Res,2014,(8):9-10.
[8]严炜,刘丹,易海若.婴幼儿支气管哮喘与细胞免疫功能异常的研究[J].中国妇幼健康研究,2013,24(2):248-250.Yan W,Liu D,Yi HR.Study on bronchial asthma and cellular immune dysfunction in infants and young children[J].Chin J Woman Child Health Res,2013,24(2):248-250.
[9]胡蓉.儿童保健门诊微量元素检测对儿童保健的影响探究[J].中外医学研究,2013,(2):39-40.Hu R.Research on the influence of trace element detection in children's health clinic on children's health care[J].Chin For Med Res,2013,(2):39-40.
[10]岑若珠.儿童保健门诊1800例微量元素检测结果探讨[J].中国医药指南,2012,10(10):213-214.Cen RZ.Discussion on the results of 1800 trace elements in children's health clinics[J].Chin Med Guid,2012,10(10):213-214.
[11]乔秀真,艾冬梅,郭九玲,等.微量元素的实验室检测方法比较[J].山西医药杂志,2018,47(1):78-80.Qiao XZ,Ai DM,Guo JL,et al.Comparison of laboratory testing methods for trace elements[J].Shanxi Med J,2018,47(1):78-80.
[12]李宜,董桂艳,冯金环.支气管哮喘儿童红细胞免疫功能的改变[J].临床误诊误治,2007,20(1):38.Li Y,Dong GY,Feng JH.Changes of erythrocyte immune function in children with bronchial asthma[J].J Clin Misdiagn Prev,2007,20(1):38.
[13]侯远生,张旭梅.必需微量元素药物的应用现状及展望[J].中国药房,1990,(5):24-25.Hou YS,Zhang XM.Application status and prospects of essential trace element drugs[J].Chin Pharm,1990,(5):24-25.
[14]王丽娟,刘菊林.微量元素对人体健康的作用[J].临床合理用药杂志,2013,6(8):63.Wang LJ,Liu JL.Effects of trace elements on human health[J].J Clin Rat Med,2013,6(8):63.
[15]张小丽.微量元素对妊娠孕妇的影响[J].现代实用医学,2015,27(5):648-650.Zhang XL.Effects of trace elements on pregnant women with pregnancy[J].Mod Pract Med,2015,27(5):648-650.
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