A simultaneous solid-phase preconcentration and spectrophotometric determination method based on adsorption of rhodamine B (RB) and Brilliant Blue FCF (BB) synthetic dyes onto Chromosorb 108 resin was developed. Solution pH, sample, eluent flow rates and eluent type were optimized. RB and BB concentrations were determined at 556 and 630 nm, respectively. Matrix effects of interference components were examined. Preconcentration factors and detection limits of the dyes were calculated. Adsorption isotherms of method, surface micrographs and pH_zpc of resin experiments were performed. Limit of detections of the method were determined 0.22 and 0.31 µg L⁻¹ for RB and BB, respectively. The method was successfully applied to determine RB and BB in industrial, foodstuff, cosmetics and environmental water samples. RB contents were found between 2.11 and 5.89 µg mL⁻¹ for liquid samples and 17.55 and 370 µg g⁻¹ for solid samples. BB concentrations in investigated solid samples were between 3.00 and 53.38 µg g⁻¹. BB contents of liquid samples were determined between 1.57 and 9.66 µg mL⁻¹. In order to test applicability of the method, analyte addition/recovery technique was also used. Quantitative recovery values ranging from 95 to 103% were obtained from the analyte addition/recovery tests.

中文翻译：

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同时预富集和测定若丹明B和亮蓝

开发了一种基于若丹明B（RB）和亮蓝FCF（BB）合成染料在Chromosorb 108树脂上吸附的固相同时富集和分光光度测定方法。优化了溶液的pH，样品，洗脱液流速和洗脱液类型。RB和BB浓度分别在556和630 nm处测定。检查了干扰成分的基质效应。计算了染料的预浓缩因子和检测限。进行了方法的吸附等温线，树脂表面显微照片和pH _zpc实验。该方法的检出限确定为0.22和0.31 µg L ^-1分别用于RB和BB。该方法已成功用于工业，食品，化妆品和环境水样品中的RB和BB的测定。液体样品的RB含量在2.11至5.89 µg mL ^-1之间，固体样品的RB含量在17.55至370 µg g ^-1之间。研究的固体样品中的BB浓度在3.00至53.38 µg g ^-1之间。液体样品的BB含量测定为1.57至9.66 µg mL ^-1。为了测试该方法的适用性，还使用了分析物添加/回收技术。从分析物添加/回收测试获得的定量回收值为95％至103％。