diene value 又称共轭二烯值或顺丁烯二酸酐值，指油中所含共轭二烯的数量。 即在特定的条件下与100g油反应所需的顺丁烯二酸酐的量，并换算成碘的质量百分数表示。 二烯值是油类的特性常数之一。
结果表明，二烯值大、酚含量低是加氢渣油催化裂化汽油诱导期短的主要原因。
Results show that the main causes of low induction period of cracked naphtha are the high diene number and low phenol content.
用傅里叶红外光谱仪，在选定的波数范围内，采用化学计量学法测量乙烯裂解汽油的二烯值。
Combined with stoichiometric method, the diene value in cracking gasoline was determined by Fourier Transform Infrared Spectroscopy at selected wavenumber region.
以过氧化值(POV)、共轭二烯型氢过氧化物含量和脂肪酸相对含量的变化为指标研究了鱼油在不同体系中的氧化稳定性。
The oxidative stability of fish oil in different systems was studied by using peroxide value (POV), conjugated diene hydroperoxide content and fatty acids content as indexes.
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