不好意思颜色弄不好,麻烦各位帮忙看看吧
lzh-zds(lzh-zds) 发表:麻烦大家帮我一下这句英文:MS Spectra of the 4700 Proteomics Analyzer ( MALDI TOF/TOF) were recalibrated internally based on one matrix ion signal giving mass accuracies in MS mode better than 35 ppm. MS/MS spetra in CID mode were externally calibrated using known fragment ion masses and ion signals obsered in the MS/MS spectrum of angiotensin.
句中是内部重新调谐和外部调谐吗? 具体怎么操作?
质量精确度要达到35ppm吗?