摘要
利用闪蒸汽化装置对试样进行气化和计量，采用分光光度法建立了1-丁烯和丁二烯等碳四烯烃中微量羰基化合物的分析方法。对分析条件进行了优化，绘制了校准曲线，并考察了该分析方法的实际运用效果。实验结果表明，优选的分析条件为：两级吸收管串联、气体流量0．3L／min、33％（w）氢氧化钾水溶液和无羰基甲醇按体积比1：2混合、测定波长530．0nm、显色时间23～33min之间。以丁酮为标样得到标准溶液的净吸光度校准曲线，在羰基化合物含量为0～60μg和0～240μg范围内，净吸光度和羰基化合物含量均呈良好的线性关系，线性相关系数大于0．999，回收率在101％-110％之间，重复性良好，羰基化合物含量的最低检测限设定为0．5mg／kg。
A spectrophotometry with a flash evaporator was established to determined trace carbonyl compounds in C4 olefins（1-butene and 1, 3-butadiene）. The analyzing conditions were optimized, the standard curves were described and actual samples were analyzed. The results indicated that the optimized conditions were： gas flow rate 0.3 L/min, determining wave length 530 nm, volume ratio of 33%（w） KOH solution to methanol without carbonyl compounds 1 ： 2, and coloring time 23-33 min. The standard curves with 2-butanone as the standard sample showed that there were good linear relationships between the content of the trace carbonyl compounds in the content ranges of 0-60 μg and 0-240 μg and the net absorbance of the standard solution, the correlation coefficients were more than 0.999, the recoveries were in the range of 101%-110%, all the relative standard deviations for 5 tests were less than 10%, and the detection limit of carbonyl compounds should be at 0.5 mg/kg.
出处
《石油化工》
CAS
CSCD
北大核心
2015年第10期1256-1261,共6页
Petrochemical Technology
