沉积物和原油中常见含氧化合物的分离分析

将沉积物抽提物和原油中复杂的非烃组成分离为酸性、中性I和中性Ⅱ3个馏分。各馏分经GC／MS分析证实羟酸和极性较大的多元醇和酮进入酸性馏分，一元酮、酯和直接一元醇进入中性馏分I，而甾醇类化合物进入中性瘤分Ⅱ。各类化合物分段清晰，没有同一化合物在不同馏分中出现的现象，且分离过程中各化合物的比例基本保持不变。本文选用地质体中今未见析出的二十二烯酸，5α（H）－雄甾－17－酮和5α（H）－3β－醇分别作为各馏分的内标化合物，定量效果好，并首次为甾醇类化合物找到了较理想的内标物。本方法经近百个样品的分离分析证实效果良好。

An Analytical Method for Oxygenated Nonhydrocarbonsin Sediments and Crudes

An analytical method for seperating nonhydrocarbons in sediments and crudes into an acidic fraction, a neutral fraction (Ⅰ), and a more polar neutral neutral fraction (Ⅱ) is reported. With this method, components only appear in individual fractions. Fatty acids and polyols and polyones are seperated into the acidic fraction; mono-ketones, esters and straight-chain alkanols fall into the neutral fraction Ⅰ; Streols are found in the neutral fraction Ⅱ. No evident alteration of ratios of the components through the separation procedures is observed. Erucic acid, 5α(H)-androstan-17-one, and 5α(H)-androstan-3β-ol are selected first time as internal standards for sterols in acidic fraction, neutral fraction Ⅰ and Ⅱ, respectively. They are good standards for quantitation of the components with gas chromatography, especially 5α(H)-androstan-3β-ol with in the first time an interal standard for quantitation of sterols. The analytical method has been proved to be effective by seperation of more than hundred sedimental samples