In the present work, cloud point extraction (CPE) of rare earths and zinc coupled with microwave plasma torch-atomic emission spectrometry (MPT-AES) was studied with 1,10-phenanthroline as the chelating agent and polyethylene glycol tert-octylphenyl ether (Triton X-114) as the surfactant. The experimental parameters affecting the cloud point extraction, such as the aqueous phase pH, Triton X-114 concentration, 1,10-phenanthroline concentration, ionic strength, and equilibration time, were systematically studied and optimized. Effects of common coexisting ions on the determinations were also investigated. Under the optimum conditions, the calibration curves were linear over the concentration range of 0.005–5 μg mL⁻¹. The limits of detection (3σ) were determined in the range of 0.3–1.0 μg L⁻¹ with a relative standard deviation range of 2.4–4.1% (n = 7). The developed CPE-MPT-AES method was successfully validated by the recovery studies in real water and human urine and serum samples.

中文翻译：

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1,10-菲咯啉和Triton X-114结合微波等离子体炬炬原子发射光谱法提取稀土和锌的浊点

在目前的工作中，以1,10-菲咯啉为螯合剂和聚乙二醇叔辛基苯基醚（ Triton X-114）作为表面活性剂。系统地研究和优化了影响浊点萃取的实验参数，如水相pH，Triton X-114浓度，1,10-菲咯啉浓度，离子强度和平衡时间。还研究了常见共存离子对测定的影响。在最佳条件下，校准曲线在0.005–5μgmL ^-1的浓度范围内是线性的。检出限（3σ）的测定范围为0.3–1.0μgL ^-1，相对标准偏差范围为2.4–4.1％（n = 7）。所开发的CPE-MPT-AES方法已通过在真实水和人尿及血清样品中的回收率研究成功验证。