Spectrophotometric determination of aluminum with m-carboxyphenylfluorone, a novel chemical probe, and its application

A highly spectrophotometric method for the determination of aluminum was developed. This method used the color reaction between m-carboxyphenylfluorone (MCPF) as a novel chemical probe and aluminum in the presence of a surfactant, poly(N-vinylpyrrolidone) (PVP, K-90) (0.03-1.40 μg of aluminum in a final volume of 10 ml at 561 nm). The proposed method showed excellent sensitivity (molar absorptibity of 1.70 × 10⁵ l mol^-1 cm ^-1) and reproducibility (within-day precision: RSD = 0.35% n = 6, between-day precision: RSD = 0.44% n = 6). Linearity was achieved over the range 3-140 μg L^-1 with a correlation coefficient of 0.9999, and the effects of foreign substances were low. 2005