Detection of Trace Tin(II) by Salicylfluoroketone Complex Fluorescence Method

Abstract

Based on the Sn(II)-salicylfluorescein (SAF)-cetyltrimethylammonium bromide (CTMAB) system, the complex fluorescence method was used to detect Sn(Ⅱ). The method was established by exploring the optimal reaction conditions, and the possible reaction mechanism was discussed. The results showed that the concentration of Sn(Ⅱ) had a good linear relationship with the fluorescence intensity of the system in the range of 0~0.40 µg/mL. The linear regression equation is ΔF = - 7.457 + 715.286ρ (µg/mL), which had a good linearity; the correlation coefficient is 0.9976, and the detection limit of the method was 0.0764 µg/mL. In the detection of Sn(Ⅱ) in synthetic water samples, laboratory wastewater, and canned pineapples, the recovery rates were 95.83%, 104.17%, and 100.0%, which showed good results.