在chemdraw软件中，这一区分更为直观。exact mass被标示为单质量，为质谱分析提供精确的同位素质量数据，帮助研究人员确定化合物的精确组成。与此相反，molecular weight则代表了化学分子量，适用于广泛的化学分析，包括但不限于计算溶液浓度、分子比等。两者的应用范围各异。分子量在化学合成、反应机理研究、...
如果你说的是chemdraw里的话，exact mass是monoisotopic mass，molecular weight是化学分子量，前者给质谱...
Exact Mass是准确分子量，一般精确到小数点四位 Exact Mass是准确分子量，如果有具体例子介绍一下就更好了:) HBr Exact Mass: 79.93 Mol. Wt:80.91m/e:79.93(100%),81.92(97.3%)
精确分子量一般是以占比最多的同位素计算的分子量。如果同位素间比例不是很悬殊，经常有两个甚至以上的...
你用chemdraw的话，画出结构就可以给出计算分子量，和实际MS测定的mass有到小数点后四位的微小区别 谢...
exact mass还是molecular weight 是根据质谱的分辨率来定了，现在新型质谱大多是高分辨率质谱，有的能精确到小数点后四位，所以一般都是exact mass。molecular weight是对分子量的计算一般不准确xact mass一般是含量丰度最高的同位素为基准计算出来的数值，如碳12，氢1等。而不考虑碳13和氢2,3等。molecular...
Human plasma-derived antithrombin was characterized in both the native and de-N-glycosylated forms (without separation of isoforms) by means of electrospray ionization ion trap mass spectrometry (ESI-ITMS). In order to determine the limits of the instrument set-up, the molecular mass precision and...
View Solution In the determination of molar mass ofA+B−, using a colligative property, what may be the value of van't Hoff factor if the solute is 50% dissociated ? Which one is a colligative property View Solution Exams IIT JEE ...
Anautomatedmolecular-featuredatabase(MFD)consistingoftheexactmonoisotopicmassof 100compounds,atleastoneexactmassproductionforeachcompound,andchromatographic retentiontimewereusedtoidentifypesticidesinfoodandwatersamples.TheMFDsoftware compilesalistofaccuratemassions,excludesnoise,andcomparesthemwiththemonoisotopicexact mas...