title: Use of lanthanum and sulphuric acid to suppress interferences in the flame photometric determination of calcium m soil extracts.
abstract: Interference by iron, aluminium and phosphate in the flame photometric determination of calcium in soil extracts is not fully suppressed by lanthanum unless dilute sulphuric acid is also present. The investigation was restricted to the oxy-acetylene flame.
authors.affiliation: Merlewood Research Station The Nature Conservancy Grange-over-Sands Lancashire, U.K.
authors.forename: C C
authors.initials: CC
authors.lastname: Evans
authors.forename: H M
authors.initials: HM
authors.lastname: Grimshaw