Nghiên cứu tách zirconi(IV) khỏi các tạp chất bằng tributylphotphat để xác định chúng bằng ICP-MS

Trong bài báo này, tiếp tục chỉ ra kết quả nghiên cứu các yếu tố ảnh hưởng đến hiệu suất chiết Zr(IV) bằng TBP nhằm hướng đến mục tiêu phân tích tạp chất trong vật liệu Zr độ sạch cao bằng ICP-MS sau khi tách nền Zr(IV) ra khỏi các nguyên tố khác bằng phương pháp chiết dung môi. | Tạp chí phân tích Hóa, Lý và Sinh học - Tập 20, số 3/2015 NGHIÊN CỨU TÁCH ZIRCONI(IV) KHỎI CÁC TẠP CHẤT BẰNG TRIBUTYLPHOTPHAT ĐỂ XÁC ĐỊNH CHÚNG BẰNG ICP-MS Đến tòa soạn 21 - 5 - 2015 Chu Mạnh Nhương Khoa Hóa học, Trường Đại học Sư phạm - ĐH Thái Nguyên SUMMARY SEPARATION OF ZIRCONIUM(IV) FROM IMPURITIES WITH TRIBUTYLPHOSPHATE FOR DETERMINATION OF THEM BY ICP-MS The investigation of the effects of extraction time, extractant concentration, diluents, acids and loading capacity of the solvent, cycles extraction on solvent extraction of zirconium (Zr) from acid solutions with tributyl phosphate (TBP) in toluene as the extractant. With the extraction of mg/mL Zr(IV), optimal conditions were: extraction medias was 8 to 12M HNO3, diluent was toluene, TBP concentration was 50% in toluene, extraction time was 1 hour, loading capacity of 50% TBP in toluene after 4 times the contact phases was mg/mL Zr(IV), stripping of metal from the loaded organic (LO) with different nitric concentrations indicated ( to ) HNO3 are the best, and (8 to 10M) HNO3 is the poorest stripping agent. Mc Cable-Thiele plot for the extraction of Zr(IV) from nitric acid indicated the requirement of 2 stages at organic phase/aqueous phase (O/A) volume ratio of 2/1 to extract the of Zr(IV). With 3 to 4 cycles extraction using 8M HNO3 (for extraction) and 10M HNO3 (for stripping), investigated higher 95% of almost impurities (35 impurities) can be separated and Zr remained in aqueous phase about 3 - 4 %. It was found that with the mentioned amount of Zr, effect of Zr on the determination of impurities, except Hf, Ti, Fe, Ga, Cd, V, Sc, As, Se by ICPMS can be negligible. This system extraction can be used in separation of the matrix Zr(IV) and determination of impurities in high purity zirconium (alloys, salts and oxides) by ICP-MS. Keywords: Extraction, zirconium, acids, TBP, toluene, impurities, ICP-MS. 1. MỞ ĐẦU Ngày nay, thế giới đã và đang sử dụng các môi Zr(IV) từ môi .