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1、总则1.1.本标准规定天然煤中腐植酸总含量的测定方法。1.2.根据本标准规定所测定的腐植酸,在良好条件下用1%氢氧化钠溶液萃取的那部分腐植酸。1.3.腐植酸的含量随着煤龄的不同而不
1, General 1.1 This standard specifies the determination of the total content of humic acid in natural coal. 1.2. According to the provisions of this standard determination of humic acid, under good conditions with 1% sodium hydroxide solution that part of the humic acid. 1.3. The content of humic acid varies with coal age