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5Â¥2018-10-08 22:22:10
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2Â¥2016-03-24 00:00:15
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3Â¥2016-03-24 06:58:34
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SiO2 [Wakogel C-200 (Wako Pure Chemical Ind. Ltd.), 10 g] was added to a solution of NaHSO4∙H2O (30 mmol, 4.14 g) in distilled water, and the mixture was stirred at room temperature for 0.5 h. The water was removed by rotary evaporator under reduced pressure, and the resulting reagent was dried in vacuo (10 mmHg) at 120 ¡ãC for 5 h. |
4Â¥2018-10-08 15:14:46









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