{"id":11045,"date":"2022-11-17T05:43:14","date_gmt":"2022-11-16T21:43:14","guid":{"rendered":"https:\/\/www.pyrazoles-derivatives.com\/?p=11045"},"modified":"2022-11-17T05:43:14","modified_gmt":"2022-11-16T21:43:14","slug":"uzoukwu-b-a-s-team-published-research-in-journal-of-the-national-science-council-of-sri-lanka-in-1993-06-30-cas-1691-93-6","status":"publish","type":"post","link":"https:\/\/www.pyrazoles-derivatives.com\/?p=11045","title":{"rendered":"Uzoukwu, B. A.’s team published research in Journal of the National Science Council of Sri Lanka in 1993-06-30 | CAS: 1691-93-6"},"content":{"rendered":"

Uzoukwu, B. A. published the artcile1-Phenyl-3-methyl-4-trifluoroacetylpyrazolone-5 as an extraction and spectrophotometric reagent for iron(III)<\/i><\/b>, Application In Synthesis of 1691-93-6<\/a>, the main research area is iron determination extraction spectrophotometry; phenylmethyltrifluoroacetylpyrazolone reagent iron determination.<\/p>\n

A rapid, simple and sensitive extraction method for the determination of Fe (III) spectrophotometrically in buffer solutions using 1-phenyl-3-methyl-4-trifluoroacetylpyrazolone-5 (HPMTFP) is described. The properties of the color of the extracted complex species with respect to pH of aqueous media, presence of synergists, various solvents, time and diverse ions are reported. Up to 500 ppm of Ag+, K+, Na+, Ba2+, Be2+, Ca2+, Cd2+, Co2+, Mg2+, Mn2+, Ni2+, Pb2+, Sr2+ and Zn2+ do not interfere. The tolerance level of the following ions which interfere were determined (ppm): Cu2+ \u00e2\u0089?20, Ce4+ \u00e2\u0089?8, Cr6+ \u00e2\u0089?100, Mo6+ \u00e2\u0089?8, U6+ \u00e2\u0089?50, V4+ \u00e2\u0089?300, V5+ \u00e2\u0089?20 and W6+ \u00e2\u0089?8. Beer’s law is valid up to 10 ppm Fe (III) (\u00ce\u00b5, 7.32 \u00c2\u00b1 0.08 \u00c3\u0097 103 L mol-1 cm-1) within an optimum pH range of 1.5-4.5.<\/p>\n

Journal of the National Science Council of Sri Lanka published new progress about iron determination extraction spectrophotometry; phenylmethyltrifluoroacetylpyrazolone reagent iron determination. 1691-93-6 belongs to class pyrazoles-derivatives, name is 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, and the molecular formula is C12H9F3N2O2, Application In Synthesis of 1691-93-6<\/a>.<\/p>\n

Referemce:
Pyrazole – Wikipedia<\/a>,
Pyrazoles – an overview | ScienceDirect Topics<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Journal of the National Science Council of Sri Lanka published new progress about iron determination extraction spectrophotometry; phenylmethyltrifluoroacetylpyrazolone reagent iron determination. 1691-93-6 belongs to class pyrazoles-derivatives, name is 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, and the molecular formula is C12H9F3N2O2, Application In Synthesis of 1691-93-6<\/a>.<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[775,131],"tags":[740],"class_list":["post-11045","post","type-post","status-publish","format-standard","hentry","category-1691-93-6","category-pyrazoles-derivatives","tag-m-w250-300"],"yoast_head":"\nUzoukwu, B. 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