同位素稀释质谱法对溶液中血管紧张素Ⅰ含量的测定  

Determination of Angiotensin Ⅰ Mass Fraction in Solution by Isotope Dilution Method

作　　者：武利庆 王晶[1] 张玲[1] 盛灵慧[1] 杨彬[1] 黎朋[1] 

机构地区：[1]中国计量科学研究院生物能源环境所,北京100013

出　　处：《分析测试学报》2008年第S1期21-22,25,共3页Journal of Instrumental Analysis

摘　　要：The presented work is to determine the mass fraction of angiotensinⅠ in solution by isotope dilution method,which is a pilot study organized by Consultative Committee for Amount of Substance.Firstly,the hydrolysis time and hydrochloric acid addition volume ratio were optimized and the degradation of natural and isotope labeled proline,valine,leucine and phenylalanine during the hydrolysis process were investigated.Secondly,the mass fractions of proline,valine,isoleucine and phenylalanine in the angiotensinⅠhydrolysis solution was determined employing isotope dilution method with their reference materials as standards.Finally,the angiotensinⅠ mass fraction and associated uncertainty were calculated according to the amino acid mass fraction obtained,which was(75.2±2.6) μg/g.It showed that the result obtained in this paper has good equivalence with the average.It can be concluded that the isotope dilution method for peptide quantification is accurate and is suitable for peptide reference materials production.The presented work is to determine the mass fraction of angiotensinⅠ in solution by isotope dilution method,which is a pilot study organized by Consultative Committee for Amount of Substance.Firstly,the hydrolysis time and hydrochloric acid addition volume ratio were optimized and the degradation of natural and isotope labeled proline,valine,leucine and phenylalanine during the hydrolysis process were investigated.Secondly,the mass fractions of proline,valine,isoleucine and phenylalanine in the angiotensinⅠhydrolysis solution was determined employing isotope dilution method with their reference materials as standards.Finally,the angiotensinⅠ mass fraction and associated uncertainty were calculated according to the amino acid mass fraction obtained,which was(75.2±2.6) μg/g.It showed that the result obtained in this paper has good equivalence with the average.It can be concluded that the isotope dilution method for peptide quantification is accurate and is suitable for peptide reference materials production.

关 键 词：angiotensinⅠ PEPTIDE quantification ISOTOPE DILUTION mass SPECTROMETRY 

分 类 号：R817[医药卫生—影像医学与核医学]