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| Phosphate buffer solution-Dissolve 6.8g of monobasic potassium phosphate in 250ml of water.Add 190ml of 0.2N sodium hydroxide in 400ml of water,adjust with 0.2N sodium hydroxide to a pH of 7.5+-0.1,dilute with water to 1000ml,and mix.Çë´ó¼Ò·ÒëÒ»ÏÂ. |
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