工业纯铝及铝合金中铝的测定

Measurement of Aluminum in industry pure Aluminum or Al alloy

试样经碱溶解，盐酸酸化，以过量的氢氧化钠分离干扰元素，在弱酸性介质中过量EDTA存在下，将铝配位，用铅盐滴定剩余的EDTA，再以氟化钠置换出与铝络合的EDTA，以铅盐滴定置换出来的EDTA，从而求得铝量。该法简便，准确度高，适用范围广，测定范围：25％-100％。

The sample is dissolved by alkali solution, acidification by hydrochloric acid, disturb elements are separated by sodium hydroxide, We may get the aluminium content in the presence of an excess of EDTA in low acidic medium by coordinating the aluminum, complexing the residual EDTA with lead salt, replacing the EDTA complexed with aluminum by using sodium fluoride, and leading salt titration replacement to EDTA. The measurement is very simple and veracity high, in point bound is wide, the bound is （25%-100%）.