本文研究了紫胶树脂在漂白和脱氯过程中分子量、热寿命、酸价、碘价、羟基值和氯含量的变化情况。
The changes of molecular weight, life under heat, acid value, hydroxyl value and chlorine content of lac resin during bleaching and de-chlorinating processes have been studied.
用原子吸收、碘价分析、BET比表面测定、XRD和IR等手段对上述催化剂以及进口催化剂进行了物理和化学表征。
Physical and chemical characterization of the catalysts as well as some import catalysts also was carried out by means of atomic spectra, activity and BET surface area measurement, XRD and IR etc.
用原子吸收、碘价分析、活性和BET比表面积测定及XRD、TG -DTA、IR等手段，对催化剂和产物进行了物理和化学表征。
Physical and chemical properties of the catalysts were studied using activity measurement, BET surface area measurement, XRD, TG DTA and IR spectra etc.
概括了几种常用的三价和五价碘试剂作为氧化剂氧化醇的研究进展，并对相应的氧化机制进行了探讨。
Advances in the oxidation of alcohol promoted by I (III) and I (v) reagents are reviewed and the relevant mechanisms are discussed as well.
第一部分为二醋酸碘苯、二价铜离子及联咪唑促进下的1，3-二羰基化合物与亚砜的反应研究。
For the first part, we stressed reactions of sulphoxide with 1,3-dicarbonyl compounds promoted by Cu(OAc)2·H2O, 2,2′-biimidazole and iodobenzene diacetate.
基于六价铬与碘化钾反应生成了单质碘，碘可以使罗丹明B发生荧光猝灭，从而间接测定六价铬的含量。
The method is based on fluorescence quenching of Rhodamine B by reaction of Cr(VI) with potassium iodide giving iodine(I2).
基于六价铬与碘化钾反应生成了单质碘，碘可以使罗丹明B发生荧光猝灭，从而间接测定六价铬的含量。
The method is based on fluorescence quenching of Rhodamine B by reaction of Cr(VI) with potassium iodide giving iodine(I2).
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