NHT-1型不透光度计的使用与维护

NHT-1型不透光度计是用于检测压燃式柴油机排气（排烟）中可见污染物的便携式智能化仪器。它采用先进的测量技术及国外先进的测量部件，适合环境保护部门、机动车检测站、发动机制造厂、汽车制造厂、汽车修理厂等单位使用。     

福林(Folin)——酚试剂法(Lowry法)测定波长的选择

认为Folin—酚试剂法测定波长应是750nm,而其改良法的测定波长是650nm。     

原子吸收分光光度法测定触媒合金中的钴

介绍了用原子吸收分光光度法测定触媒合金中的钴，其结果与标准值一致。     

DPD分光光度法对氯和二氧化氯的区分测定

利用ＤＰＤ分光光度法对氯和二氧化氯的区分测定进行了研究。结果表明，ＤＰＤ法可准确区分两者的含量，该方法既可用于确定二氧化氯发生器的产物成分，确定其产率，并调整工艺参数，提高工作效率，同时也可用于确定投加量余量的成分。     

增效黄连素胶囊中两种组分的快速测定法

增效黄连素胶囊中含有盐酸黄连素和甲氧苄氨嘧啶,本文采用紫外分光光度法在波长349.6 nm处不经分离直接测定盐酸黄连素的含量,用三波长分光光度法不经分离直接测定甲氧苄氨嘧啶的含量。方法简便、快速、回收率高,测定结果与陕西药品标准基本一致,取得了满意的结果。     

THE STUDY ON THE CHANGES OF ZINC, COPPER, CALCIUM AND MAGNESIUM IN PLASMA AND ERYTHROCYTES DURING CARDIOPULMONARY BYPASS

Objective To study the changes and their influence factors involved of zinc, copper, calcium and magnesium in plasma and erythrocytes during cardiopulmonary hypass(CPB). Methods Zinc, copper, calcium and magnesium values in plasma and erythrocytes were measured by atomic absorption spectrophotometer during CPB. Results Zinc and copper levels in plasma were significantly elevated above preinduction level before perfusion, hut calcium and magnesium levels did not change significantly; zinc, copper and calcium levels in plasma were significantly below preoperation level during CPB, hut magnesium level in plasma was significantly increased above preoperation; zinc level in plasma was increased to preoperation level after CPB and began to decrease again at 8 hours after CPB,copper level in plasma was increased to preoperation level at 20 hours after CPB, calcium in plasma was increased significantly from beginning to 8 hours after CPB, magnesium level in plasma was decreased to preoperation level at 8 hours afterCPB. Concentration of zinc , copper, calcium and magnesium in erythrocytes did not change significantly. Conclusion During CPB, the changes of zinc, copper, calcium and magnesium had relation to hemodilution, operative wound, carrier protein, stress and component of priming Solution and cardioplegic solution, hut no relation to transferfrom plasma erythrocytes. The results indicate that it is beneficial to patient‘s recovery to supplement zinc, copper, calcium and magnesium properly by different ways during cardiac perioperation.     

用原子吸收分光光度法快速测定硫酸镍中铜,铁等元素

硫酸镍用盐酸、过氧化氢溶解，采用原子吸收分光光度法并结合浓度直接读法和标准加入法分别测定镁、钙、钠、钴及铜、铁、钾元素含量。该方法准确、快速，现已用于科研，生产中，得到满意结果。