摘要
研究了以Bi3-作催色剂的钼－硫氰酸铵－孔雀绿显色体系高灵敏光度法测定粮食中痕量钼的方法，缔合物的吸收峰位于680nm，表观摩尔吸光系数3．60×106L·mol－1·cm－1·钼浓度在0～100ng／25ml范围内符合比耳定律，研究了共存离子的影响，研讨了显色反应的吸附机理．
A high sensitive spetrophotometry for dempination of molybdenum in cereal has been developed. Bismuth (Ⅲ) was used to catalyze the reaction of reducing Mo (Ⅵ) to Mo(Ⅴ)by thiocyanate. The ion-association complex exhibits rnaximum absorption at 680nm, its apparant molar absorptivity is 3. 60 ×106L·mol-1·cm-1. Beer's law is obeyed in the range of 0~ 100ng/25ml for Mo (Ⅵ). The reaction mechanism has bo discussed. The methed has been applied to the determioation of Mo in cereai with satisfactory results.
出处
《粮食储藏》
1996年第2期38-41,共4页
Grain Storage
关键词
粮食
钼
离子缔合物
cereal, molybdenum, ion-association complex
