[Measurement of aluminum (III) in crops by synergistic chromatic reaction].
In the presence of OP, a sensitive color reaction of aluminum (III) on pyrocatechol violet and rhodamine 6G has been studied. In a NH4Ac-HAc (pH = 6.5) medium, aluminum (III) ions form an ions-associate complex with pyrocatechol violet and rhodamine 6G. The composition of the complex is Al (III) : PV: Rh6G = 1 : 2 : 4. The maximum absorption of the ions-associate complex is at 580 nm with an apparent molar absorptivity of 6.8 x 10(4) L x mol(-1) x cm(-1). Beer's law is obeyed in the range of 0-7 microg/25 mL of aluminum. The method is highly selective and has been applied to the determination of trace aluminum in crops with satisfactory results.
Liu
W
W
Department of Chemical Engineering, Huaihai Institute of Technology, 222005 Lianyungang.
Ma
W
W
Yu
R
R
D000535:Aluminum / Q000032:analysis*; D018556:Crops, Agricultural / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*
D000535:Aluminum