原创: NuChek厂家直采，平行进口,求推荐!
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Nu-Chek has been preparing your highly purified lipid compounds both as individual standards and as model mixtures for the past 45 years.
But that’s not the entire story. We go back to times when criteria of purity was based on such things as Iodine value and melting point.
Pure Methyl Oleate was a compound that contained enough inherent Stearate and Linoleate to give the Oleate its theoretical Iodine value.
Palmitic Acid was often designated as pure when it contained enough Myristate and Stearate to give a correct melting point.
Before the advent of GLC and TLC, triglycerides were synthesized by the interesterification of what was assumed to be pure methyl ester. The reaction end product was made available to researchers as highly purified triglyceride. Of course, chromatography confirmed later that the best of these reactions never went to completion beyond 75%-80%.
Indeed, one can go on indefinitely over incorrect data which has been listed in the literature. Physical data on lipids even when listed in the handbooks is many times not valid.
Within more recent years, scientific research in the lipid field has made some fantastic progress.
Chromatography along with other sophisticated instrumentation has eliminated analysis guess work.
Only those isolated fractions which contain no detectable impurities even with large overloads (as analyzed both by GLC and TLC) are able to pass our rigid purity requirements, and in turn are made available to the scientific community for research purposes.
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苏州蚂蚁淘生物科技有限公司是一家经营医药标准品、化工环境标准品、高端试剂的专业公司，是全球领先科研方案的专业供应商。 自成立以来，公司坚持以“保障客户利益是我们的第一追求”为经营宗旨，发展成为全球多个高端标准品公司国内总代理和授权代理商，能提供超过100000种的有机和无机标准品或试剂，产品涉及药企，科研单位，检测机构，工厂实验室和高校等绝大部分科研单位；同时提供优质的咨询服务，实力雄厚。 公司以代理经营为主，代理20多个国外知名品牌的标准品、对照品，高端化学试剂，包括欧标EP,欧盟IRMM,日标JP,印度标IP,加拿大TRC,TLC,MC,英国BP,LGC,NIBSC,美国NIST,ChromaDex,美国Zyagen,挪威Chiron等。
全部回答 （共 2 条）
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Nu-Chek has been preparing your highly purified lipid compounds both as individual standards and as model mixtures for the past 45 years.But that’s not the entire story. We go back to times when criteria of purity was based on such things as Iodine value and melting point.Pure Methyl Oleate was a compound that contained enough inherent Stearate and Linoleate to give the Oleate its theoretical Iodine value.Palmitic Acid was often designated as pure when it contained enough Myristate and Stearate to give a correct melting point.Before the advent of GLC and TLC, triglycerides were synthesized by the interesterification of what was assumed to be pure methyl ester. The reaction end product was made available to researchers as highly purified triglyceride. Of course, chromatography confirmed later that the best of these reactions never went to completion beyond 75%-80%.Indeed, one can go on indefinitely over incorrect data which has been listed in the literature. Physical data on lipids even when listed in the handbooks is many times not valid.Within more recent years, scientific research in the lipid field has made some fantastic progress.Chromatography along with other sophisticated instrumentation has eliminated analysis guess work.Only those isolated fractions which contain no detectable impurities even with large overloads (as analyzed both by GLC and TLC) are able to pass our rigid purity requirements, and in turn are made available to the scientific community for research purposes.
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