In the second step K2SO4 can be obtained from potassium bisulfate by means of desalting with methanol.
第二步就可以使用甲醇对硫酸氢钾脱盐，然后从中获取硫酸钾。
This standard solution was accurately prepared in super-clean laboratory with K2SO4 and sub-packed in 20 ml ampoules.
本标准溶液以硫酸钾在超净实验室中准确配制并分装于20 毫升安瓿中。
The correlation didn't reach significant level. 0.2 molL-1 K2SO4 wasn't the suitable available Se extractant for paddy soil.
K2SO4对土壤硒的浸提量低，与植株含硒量间的相关性不显著，不适宜作水稻土有效硒的提取剂。
The correlation didn't reach significant level. 0.2 molL-1 K2SO4 wasn't the suitable available Se extractant for paddy soil.
K2SO4对土壤硒的浸提量低，与植株含硒量间的相关性不显著，不适宜作水稻土有效硒的提取剂。
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