Результаты (
английский) 3:
[копия]Скопировано!
7.4.2 to convert the resin to the hydrogen form, using 20 ml of 4 m hydrochloric acid through the column. the column effluent will be acidic to ph test paper. drain the liquid level down to just above the top of the column, wash with 5 or 6, as well as one of distilled draining ml water, the water wash down to the top of the column between each washing. the final wash solution should not be acidic to ph test paper. the column will have an exchange capacity of around 20 milliequivalents and should be regenerated after one liter of titrant has been used on the standards and samples passed through the column
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