Park C I, Cha K W
Department of Chemistry, Inha University, Inchon 402-751, South Korea.
Talanta. 2000 Apr 3;51(4):769-74. doi: 10.1016/s0039-9140(99)00351-3.
A rapid and sensitive method for the trace level determination of aluminium based on the formation of a 1:1 complex with chromotropic acid (1,8-dihydroxynaphthlene-3,6-disulfonic acid) in an methanol medium is reported. The fluorescence intensity of the system was 50 times greater than that of the system without aluminium. This method is very sensitive and selective for the direct determination of aluminium ion. The fluorescence is excited at 346 nm and measured at 370 nm. The optimum conditions are a chromotropic acid concentration of 5.0 ml (1.0x10(-4) M) and pH 4.0+/-0.5 (acetic acid-sodium acetate buffer). The fluorescence intensity is a linear function of the concentration of Al(III) in the range 2-100 ng ml(-1) and the detection limit is 1.0 ng ml(-1). The method has been applied successfully to the determination of trace amount of Al(III) in tap, river and sea-water samples.
报道了一种基于在甲醇介质中与变色酸（1,8 - 二羟基萘 - 3,6 - 二磺酸）形成1:1配合物来痕量测定铝的快速灵敏方法。该体系的荧光强度比无铝体系的荧光强度大50倍。此方法对直接测定铝离子非常灵敏且具有选择性。荧光在346 nm处激发，在370 nm处测量。最佳条件为变色酸浓度5.0 ml（1.0×10⁻⁴ M），pH 4.0±0.5（乙酸 - 乙酸钠缓冲液）。荧光强度在2 - 100 ng ml⁻¹范围内是Al(III)浓度的线性函数，检测限为1.0 ng ml⁻¹。该方法已成功应用于自来水、河水和海水样品中痕量Al(III)的测定。
