The water,dimethylamine and formaldehyde dimethylhydrazone in unsymmetrical dimethylhydrazine were determined by capillary gas chromatographic method with benzene as internal standard.The results showed that good sepa...The water,dimethylamine and formaldehyde dimethylhydrazone in unsymmetrical dimethylhydrazine were determined by capillary gas chromatographic method with benzene as internal standard.The results showed that good separation effect was obtained with the capillary column SE-54 and weakness of trace impouring imprecisely was avoided by the internal standard method.The method has broad linear scope and the correlation coefficient for water,dimethylamine and formaldehyde dimethylhydrazone is 0.9987,0.9993 and 0.9986 respectively,all approaching 1.The recoveries for water,dimethylamine and formaldehyde dimethylhydrazone in sample are 99.4%,101%and 99.7% separately.In addition,this method had high accuracy and good repetability.展开更多
文摘The water,dimethylamine and formaldehyde dimethylhydrazone in unsymmetrical dimethylhydrazine were determined by capillary gas chromatographic method with benzene as internal standard.The results showed that good separation effect was obtained with the capillary column SE-54 and weakness of trace impouring imprecisely was avoided by the internal standard method.The method has broad linear scope and the correlation coefficient for water,dimethylamine and formaldehyde dimethylhydrazone is 0.9987,0.9993 and 0.9986 respectively,all approaching 1.The recoveries for water,dimethylamine and formaldehyde dimethylhydrazone in sample are 99.4%,101%and 99.7% separately.In addition,this method had high accuracy and good repetability.
文摘淋巴浆细胞淋巴瘤(lymphoplasmacytic lymphoma,LPL)是一种少见的兼具惰性B淋巴细胞及浆细胞特点的特殊类型非霍奇金淋巴瘤,因涉及多系统、多脏器而临床表现多样,实验室检查缺乏特异性[1],使本病的确诊较为困难,若再伴有弥漫大B细胞淋巴瘤(diffuse large B-cell lymphoma,DLBCL)的转化,则更易导致误诊、漏诊及误治。笔者对1例CT及临床误诊的LPL伴DLBCL转化的病例进行报告,结合文献分析其误诊的原因,旨在提高对该病的认知。
