c28
c28-
A method for determination of claroline ( C19 ~ C28 ) in food is performed by the use of gas chromatography in hyphenation with mass spectrometry .
本文采用气相色谱质谱联用技术，通过对样品中C19C28的全程均能分析来对食品中的矿物油进行测定。
-
The sterane ratio of C29 / C27 + C28 + C29 is about 0.5 , which differs from that of the hydrocarbons related to oceanic planktons .
甾烷C29／（C27＋C28＋C29）值为0.5左右，与海洋浮游生物来源的有机质生烃相区别。