GB/T 12702-1999 in English

《GB/T 12702-1999工业用丁二烯中特丁基邻苯二酚（TBC）的测定 高效液相色谱法》由TC63（全国化学标准化技术委员会）归口，主管部门为中国石油和化学工业联合会。
本标准规定了测定工业用1，3-丁二烯中特丁基邻苯二酚［4-(1,1-二甲基乙基)-1，2-苯二酚或简称TBC］含量的高效液相色谱法。阻聚剂TBC也能用分光光度法(GB/T6020)测定,但该法不能区分有活性的阻聚剂及其已没有活性的氧化产物，而本法却能直接测得活性ＴＢＣ的含量，适用于TBC含量范围为0~250mg/kg的丁二烯试样。注意：1TBC的熔化或浓缩溶液对人体皮肤有强烈的刺激作用，如误入口中则更有毒性，操作中应予以注意。２处理丁二烯的操作步骤应在通风橱中进行，且远离明火，操作者也应采取个人劳保措施(如戴手套和护目镜等)。

Scope

This standard specifies the high-efficiency liquid for determining the content of tert-butylcatechol [4-(1,1-dimethylethyl)-1,2-benzenediol or TBC] in industrial 1,3-butadiene. phase chromatography. Inhibitor TBC can also be determined by spectrophotometry (GB/T 6020), but this method cannot distinguish between active inhibitors and inactive oxidation products, but this method can directly measure the content of active TBC , suitable for butadiene samples with TBC content ranging from 0 to 250 mg/kg. Note: 1. The molten or concentrated solution of TBC has a strong irritating effect on human skin, and it is even more toxic if it is swallowed by the mouth. Care should be taken during operation. 2 The operation steps of handling butadiene should be carried out in a fume hood and away from open flames, and the operator should also take personal labor protection measures (such as wearing gloves and goggles, etc.).