利用有效碳数法可以设计农药分析实验方案和在无标样的情况下测定农药杂质含量。
The effective carbo number method can be used in designing experimental methods for pesticides analysis and pesticide impurities analysis without standards sample.
卟啉的平均分子结构简式衡量其取代基的组成，尤其对地质体中相同碳数的卟啉“ 混合物” 大环外取代基的构成十分有效。
The average condensed formula of molecular structure is effective to derive the composition of the peripheral substituents of porphyrins, especially geoporphyrins with identical carbon numbers.
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