This standard specifies the extraction method of sodium and potassium dissolved in dilute hydrochloric acid from lignite. This standard applies to lignite.
GB/T 16416-1996 history
2007GB/T 16416-2007 Method of extraction for the determination of sodium and potassium in brown coal soluble in dilute hydrochloric acid
1996GB/T 16416-1996 Method of extraction for the determination of sodium and potassium in brown coal soluble in dilute hydrochloric acid