In this study, electromembrane extraction (EME) combined with micro-EME (µ-EME) was used for the selective extraction of Cr(VI) from food samples (milk powder, Ocimum basilicum, and fish samples). Electrothermal atomic absorption spectrometry was used for the quantification of Cr(VI). Under the optimized extraction conditions, the extraction recovery of Cr(VI) was 73.7%. This proposed method provided a linear range from 0.01 to 5.0 ng/mL and the limit of detection (LOD) and limit of quantification (LOQ) were 0.003 and 0.010 ng/mL. The %RSD (n = 5) was in the range of 11.2–11.8% at 0.05, 1.0 and 2.5 ng/mL of Cr(VI), and the enrichment factor was 584. The accuracy of the method was evaluated by analysis of SRM 2700 as a certified reference material (CRM) and result was in good agreement with the certified value.

在本研究中，电膜萃取 (EME) 与微 EME (μ-EME) 相结合，用于从食品样品（奶粉、罗勒和鱼样品）中选择性萃取 Cr(VI)。电热原子吸收光谱法用于定量 Cr(VI)。在优化的萃取条件下，Cr(VI)的萃取回收率为73.7%。该方法提供了 0.01 到 5.0 ng/mL 的线性范围，检测限 (LOD) 和定量限 (LOQ) 分别为 0.003 和 0.010 ng/mL。Cr(VI) 浓度为 0.05、1.0 和 2.5 ng/mL 时，%RSD (n = 5) 范围为 11.2–11.8%，富集因子为 584。 通过 SRM 分析评估方法的准确性2700 作为有证标准物质 (CRM)，结果与认证值吻合良好。