The solventĮxtraction of chromium (III) with bis-(2-ethyl hexyl) phosphoric acid in Sciences/Supplements Proceedings of IUPAC International Congress on Analyticalġ0. Separation of chromium (III) and chromium (VI) by the combination of solvent Selective extraction process for chromium (VI) in industrial wastewater. Liquid-liquid extraction with tributylphosphate from acidic chloride media. Of hexavalent chromium species from different solid environmental, industrial In wastewater based on an organic polymer as solid phase extraction materialĦ. Development of a novel, fast, sensitive method for chromium speciation Chromium as an environmental pollutant: Insights on induced plant Persistence, toxicity, and bioaccumulation. EnvironmentalĬhemistry and ecotoxicology of hazardous heavy metals: environmental Pengekstrakan cecair-cecair, diklorometana, reagen pasangan ionġ. Menunjukkan kepekatan Cr(VI) yang rendah dan perolehan semula yang baik (91.1-109%). Kaedah yang dicadang ini telahĭigunapakai bagi analisis sampel air sisa sebenar dan sampel yang dipaku, ia = 1.1%) adalah baik berdasarkan keperluan yang dinyatakan dalam Appendix F ofĪOAC (2016) bagi validasi kaedah analisis. Kebolehulangan (RSD r = 0.71%) dan kebolehhasilan semula (RSD R Pengesanan dan kuantifikasi telah dihitung masing-masing pada 0.012 mg L –1 and 0.04 mg L –1. Lengkung kalibrasi adalah linear pada julat 0.05 hingga 2.0 mg L –1, dan Pengekstrakan, dan masa goncangan ialah 15 minit bagi setiap kitaran Penghasilan kompleks ditentukan seperti berikut: pH antara 1.0 hingga 3.0 0.05 mol L – 1 TBAHS disediakan dalam DCM, tiga kali

(DCM) paling efektif sebagai pelarut pengekstrakan. Sekitar, dan kehadiran bersama Cr(III) dalam matrik sampel turut dikaji untuk (pengekstrakan tunggal atau ulangan), tempoh pengawetan sampel pada suhu Pengekstrakan (dari 3 hingga 30 minutes), bilangan kitaran pengekstrakan Isobutil keton-MIBK, diklorometana-DCM, dan klorofom), nilai pH (dibawah 1.0,ġ.0, 2.0 dan 3.0) di dalam fasa akues, kepekatan TBAHS di dalam pelarut organik

Melalui penghadaman asid, dan serapan atom telah diukur pada 357.9 nm. Cr(VI) yang telah diekstrak di dalam fasa organik TBAHS telah disediakan dalam pelarut organik bagi tujuan meningkatkan Hidrogensulfat (TBAHS) sebagai reagen pasangan ion di dalam medium berasid. Prinsip pengekstrakan cecair-cecair menggunakan tetrabutylammonium Sampel yang mudah telah dikaji dan dibangunkan bagi penentuan terpilihĬr(VI) di dalam air sisa atau efluen berdasarkan Keywords : Cr(VI), Cr(III), liquid-liquid extraction, Spiked samples, showing very low Cr(VI) concentrations for most samples and The proposed method was applied to real wastewater samples and The requirements presented in Appendix F of AOAC (2016) for analytical method Repeatability (RSD r = 0.71%) and reproducibility (RSD R = To be 0.012 mg L –1 and 0.04 mg L –1, respectively. The method detection and quantification limit values were estimated Mol L – 1 TBAHS prepared in DCM, triple extraction, and a shaking duration ofġ5 minutes for each extraction cycle. The most favorable conditions forĬomplex formation were determined as follows: a pH of around 1.0 to 3.0 0.05 Was the most effective extraction solvent. The results showed that dichloromethane (DCM) Temperature, and co-existence of Cr(III) in the sample matrices, were investigated to discover the optimized Ketone-MIBK, dichloromethane-DCM, and chloroform), pH values (lower than 1.0, 1.0,Īqueous phase, TBAHS concentrations in the organic solvent (0.02, 0.04, 0.05, and 0.06 mol L –1), extraction duration (from 3 to 30 minutes), number of extraction cycles (single or repeated extraction), sample preservation duration at ambient The influences of several working parameters, namely, organic solvents (methyl isobutyl

The extracted Cr(VI) in the organic phase endured the acid TBAHS was prepared in an organic solvent to improve the extractionĮfficiency. Tetrabutylammonium hydrogensulfate (TBAHS) as the ion-pair reagent in an acidic Simple sample preparation was investigated andĭeveloped to selectively determine Cr(VI) in wastewater samples or effluents based on the liquid-liquid Nguyen Cong-Hau 1, Le-Thi Anh-Dao 1, Nguyen Thanh-Nho 1*, Le-Thi Huynh-Mai 2, Le Nhon-Duc 3, Do Minh-Huy 1ģ Warrantek Joint Stock Company, Testing Center, Can Tho City, Journal of Analytical Sciences Vol 26 No 2ĬHROMIUM (VI) ANALYSIS IN EFFLUENTS USING LIQUID-LIQUID EXTRACTIONĬOUPLED WITH FLAME ATOMIC ABSORPTION SPECTROMETRYĮfluen Menggunakan Pengekstrakan Cecair-Cecair Bersama Spektrometri Serapan

Acid digest of chromium chloride