Results 91 to 100 of about 2,300 (148)
Gaoya dianqi, 2005 高压并联电容器极对壳绝缘水平是保证其在电网安全运行的重要参数。对隐箔引线片、露箔无内熔丝、露箔有内熔丝等几种电极结构的10kV全膜电容器进行极对壳耐压试验,测量局部放电特征并对油中气体进行气相色谱分析,分析不同电极结构对电容器极对壳绝缘特性的影响,为电容器制造厂家和电力系统的绝缘监督提供一定的参考依据。
闫静, 谢诚, 马志瀛, 吴军辉
doaj
浙江大学学报. 农业与生命科学版The fingerprints of different grades of Xishi Shijian tea were established by detection of high performance liquid chromatography-fluorescence detector (HPLC-FLD), high performance liquid chromatography-ultraviolet (HPLC-UV) detector, ultrahigh ...
金英(JIN Ying) +8 more
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Gaoya dianqi, 2008 介绍了国内外变压器绝缘老化绝缘诊断的发展及现状,建立了用顶空气相色谱法测定变压器油中微量丙酮的新方法,并对顶空法的样品预处理、方法的灵敏度、精密度、准确度、测定范围以及色谱条件进行了系统的研究。实验室试验和现场采样分析的验证表明,该方法稳定,测定结果良好,可用于变压器油样中微量丙酮的测定。
王宏 +4 more
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Study on dissolution behaviors of chalcopyrite in acid solution [PDF]
, 2007 为了探索黄铜矿低温常压湿法氧化(O2)浸出的可行性,研究了黄铜矿在酸性介质中的溶解行为,考察了温度、酸浓度及溶浸时间等对黄铜矿酸浸行为的影响,计算了酸浸过程中铜的浸出率,分析了元素硫的变化行为及残渣微观结构。结果表明,黄铜矿常压湿法氧化(O2)浸出过程的酸浸阶段会产生硫化氢;黄铜矿的溶解能力随温度变化先快后慢,后段接近线性增长,溶解主要发生在前2小时;低温有利于溶解,而最适酸浸pH约-0.4。pH对溶解的影响小于温度的影响。The dissolvability behaviors of ...
李黎 +5 more
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Distribution of dimethylsulfide of Xiamen sea surface water in spring [PDF]
, 2004 采用固相微萃取(SPME) 气相色谱法(GC)测定了厦门海域20个站位表层海水中DMS二甲基硫的含量,并对其分布进行分析。结果表明,厦门海域DMS含量在0 65～40 69nmol·L-1,平均浓度为12 83nmol·L-1。其中,西海域的含量最高,东海域次之,同安湾最低。与其它海域海水中DMS浓度比较,厦门海域DMS含量较高,浓度变化范围大,与叶绿素a浓度及表层水温、盐度之间无明显的相关关系。Dimethylsulfide (DMS) in surface seawater samples ...
李猛, 袁东星, 金晓英, 陈猛
core
[Safety study of resin-based dental materials using gas chromatography-mass spectrometry techniques]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiLi Y, Zeng Y, Du Z, Ren G.
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[Determination of vitamin A and vitamin E in human tear by liquid chromatography-tandem mass spectrometry and analysis of their relationship with dry eye]. [PDF]
Se PuLuo BB, Jiao JR, Bai J, Liu XY.
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[Determination of 30 homologues of phosphatidylcholines and lysophosphatidylcholines in human serum by liquid chromatography-tandem mass spectrometry and their correlation analysis with coronary artery disease]. [PDF]
Se PuLi WY +6 more
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