宇通创立客车行业首个电泳标准

经济发展到了充分竞争的买方市场阶段,不少企业已真正意识到标准的力量,标准时代已经来临,得标准者得天下已成为企业的共识。靠标准提高竞争力,靠标准拓宽市场,越来越多的高素质企业已通过创立标准,走上了一条平稳且快速的发展之路。     

Simultaneous determination of berberine, matrine and oxymatrine in traditional Chinese medicines by using nonaqueous capillary electrophoresis

A rapid method for the simultaneous determination of berberine (BBR), matrine (MT) and oxymatrine (OMT) by nonaqueous capillary electrophoresis (NACE) was developed. Optimum separation of the analytes was obtained on a 50cm×50μm i.d. fused-silica capillary using a non-aqueous buffer system of 70mM ammonium acetate, 7.0% acetic acid and 10% acetonitrile at 25kV and 20℃. The relative standard deviations (R.S.D.) of the migration times and peak areas of the three active components were 0.06%-0.20% and 0.12%-3.41% for berberine, 0.11%-0.60% and 0.74%-1.63% for matrine, 0.15% and 0.45% for oxymatrine, respectively. Detection limits of berberine, matrine and oxymtrine were 0.18μg/mL, 4.08μg/mL and 4.16μg/mL, respectively. In the tested concentration range, good linear relationships (0.9992 for berberine, 0.9988 for matrine and 0.9988 for oxymatrine) were observed. The linear calibration ranges were 0.45-360.0μg/mL for berberine, 8.16-408.0μg/mL for matrine and 20.8-416.0μg/mL for oxymatrine. This method has been successfully applied to the phytochemical analysis of alkaloids extracts from two commonly used traditional Chinese herbal drugs: Sophora flavescens Ait. (Kushen) and Cortex phellodendri chinensis (Huangbai) and their medicinal preparations.     

“NPECS”电泳涂装最终水洗的再循环利用方法

介绍了ＮＰＥＣＳ电泳涂装最终水洗水的再循环利用利用法的原理，装置及效果。     

阴极电泳涂装工艺控制管理

随着汽车工业的发展,对汽车零部件,尤其是外观质量的要求越来越高.生产的汽车车轮目前采用的是阴极电泳涂装工艺,该工艺是汽车行业普遍应用的涂装方法,但不同的工件具体的工艺控制要求也不同.主要介绍了汽车车轮的涂装工艺控制要求.