title: [Indirect determination of sulphur in plant tissues by flame atomic absorption spectrometry].
abstract: The sulphur in plant tissues was transformed into SO4(2-) by digestion and it reacted on BaCrO4 to produce CrO4(2-) by exchange reaction, then the sulphur quantity in the plant was indirectly determined by flame atomic absorption spectrometry (FAAS). Various conditions affecting the quantative determination of SO4(2-) with this method were studied and the interference of PO4(3-), which existed in the digestion solution, could be overcome by addition of sufficient calcium. The results obtained by this method are consistent with those obtained by ICP-AES.
authors.affiliation: Central Laboratory, Agricultural University of Shandong, 271018 Taian.
authors.forename: C
authors.initials: C
authors.lastname: He
authors.forename: J
authors.initials: J
authors.lastname: Wang
authors.forename: H
authors.initials: H
authors.lastname: Fan
mesh_terms: D064753:Ammonium Hydroxide; D002138:Calibration; D000431:Ethanol / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D006878:Hydroxides / Q000737:chemistry; D059828:Plant Cells; D010944:Plants / Q000737:chemistry*; D015203:Reproducibility of Results; D052616:Solid Phase Extraction; D013054:Spectrophotometry, Atomic / Q000379:methods*; D013455:Sulfur / Q000032:analysis* / Q000302:isolation & purification; D013997:Time Factors
chemical_list: D006878:Hydroxides; D000431:Ethanol; D064753:Ammonium Hydroxide; D013455:Sulfur