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关注：1
2013-05-23 12:21
求翻译：Acetonitrile of chromatographic grade was obtained from J &K Chemical Ltd. (China). Ethanol and methanol of analytical grade were purchased from Beijing Chemical Reagents Co. (Beijing, China) and double-distilled water was used in all experiments. All solvents prepared for HPLC were filtered through a membrane filter a是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
Acetonitrile of chromatographic grade was obtained from J &K Chemical Ltd. (China). Ethanol and methanol of analytical grade were purchased from Beijing Chemical Reagents Co. (Beijing, China) and double-distilled water was used in all experiments. All solvents prepared for HPLC were filtered through a membrane filter a
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2013-05-23 12:21:38
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2013-05-23 12:23:18
乙腈色谱职系曾向J&K化学有限公司 (中国)。 乙醇、甲醇的购买了分析级从北京化学试剂有限公司 (北京,中国)和双蒸溜水被用在所有实验。 为编写所有溶剂过滤HPLC是通过一个膜过滤和使用着经严格挑选超声波条件下才使用。
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2013-05-23 12:24:58
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2013-05-23 12:26:38
从 J 科技 K 化学 （中国） 有限公司获得乙腈的色谱等级。乙醇和甲醇分析职系购自北京化学试剂有限公司 （中国北京），所有实验中使用双蒸馏水。高效液相色谱法为编写的所有溶剂通过滤膜过滤和脱气之前使用超声波条件下。
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2013-05-23 12:28:18
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