He C, Wang J, Fan H
Central Laboratory, Agricultural University of Shandong, 271018 Taian.
Guang Pu Xue Yu Guang Pu Fen Xi. 1998 Apr;18(2):223-6.
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.
植物组织中的硫经消化后转化为SO4(2-)，它与BaCrO4发生交换反应生成CrO4(2-)，然后通过火焰原子吸收光谱法（FAAS）间接测定植物中的硫含量。研究了影响该方法定量测定SO4(2-)的各种条件，通过加入足够的钙可以克服消化液中存在的PO4(3-)的干扰。该方法得到的结果与电感耦合等离子体发射光谱法（ICP-AES）得到的结果一致。
