MARYGROVE COLLEGE LIBRARY - Baker Thioacetamide Reagent (See page 107 for story) - Chemical Development

Sep 28, 2026

Reagent and analytical chemistry material centered on Baker Thioacetamide reagent crystals, describing their composition, high assay and purity, solubility, and use as a safe sulfide ion source for quantitative and qualitative separation of heavy metal ions. The text explains practical handling advantages versus gaseous hydrogen sulfide and packaging formats with lot analysis labeling. It also includes journal-style research content, including lead interference removal in fluoride analysis using cation exchange resin and related reagent preparation details.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages32

Reading Time1 h 21 min

AccessFree to download

Table of Contents

Removal of Lead Interference in Fluoride Analysis by Cation Exchange Resin

Reagents

Procedure and Interference Control

MARYGROVE COLLEGE LIBRARY DECEMBER,1955DETROIT.MICHIGANDi产 c _ __MOVEVOL.44,NO.4 emist nayst DEC9-'55 J.T.BAKER CHEMICAL CO.Phillipsburg,New Jersey published by # 'Baker Analyzed'REAGENT ...NONAUSEATINGThioacetamide i%,CaYSTALaker Analyzed'REAGEJODOR隔新LIm09535Aiey iO,c50,JMhg longendndHIGH ASSAY 953531OAGE Kep ialoiued con ·NALYSIS OF LOT NO. 90 %江AxtR CHEMICAL co.PHrLussay (CH₄CSNH₂)…… 98.8 IL6⁰-|13.8°C 0MeltIng Nal0sideg o Ianition … U. A superior sulfide precipitant free fromhazards of H₂S,Baker Thioacetamide,re-agent grade,is a crystalline product ofhigh assay and high purity,containingover 40%available sulfide.It is verysoluble in water,alcohol and benzene,hydrolyzing smoothly in either acidic oralkaline solution to provide a convenientsource of sulfide ion for both the quanti-tative and qualitative separation of theions of heavy metals. dense,easily filterable,and the rate ofprecipitation can be more easily controlled.Baker Thioacetamide is ideal for class-room use,particularly when a hood is notemployed.%4 pound may suffice for 50students for the usual semester qualita-tive course. Baker Thioacetamide Reagent,Crystal,is packaged in 1 ounce, pound,and 1pound amber glass bottles.Like all 'BakerAnalyzed'Reagents,each label bears theactual lot analysis of the contents. Thioacetamide is rapidly supplanting gas-eous hydrogen sulfide as a precipitant be-cause of its ease-of-use and freedom fromnoxious and corrosive properties.Sulfidesprecipitated by Thioacetamide-unlikethose with H₂S-are coarsely crystalline, FREEFor reprints of the Thioacetamide reviewand articles from CHEMIST-ANALYST,write J.T.Baker Chemical Company,Dept.R-V,Phiillipsburg,New Jersey. Baker ChemicalsREAGENT·FINE ·INDUSTR1AL Chemist- J.T.Baker Chemic al Co. A.J.BARNARD,JR.,Editor E.L.NAGLE,Editorial Asst. A⁸TICLES Removal of Lead Interference in Fluoride Analysis by Cation Exchange Resin Potassium Rhodizonate as an Indicator in Argentometric Titrations Potentiometric Determination of Iron and Copper with Quinquevalent Spot Tests for Detection and Differentiation of Hyposulfte and Sodium Rapid Colorimetric Estimation of Soil Copper Employing Sodium Diethyl- Solubility of Cobalt(II)in Sodium and Potassium Hydroxide Solutions Complexometric Titration of Scandium with PAN as Indicator Note on Separation of Copper by Aluminum……………………R.S.Young Potentiometric Determination of Manganese by Oxidation of_Alkaline Tin Determination in Solders and Babbitts ………………Charles Goldberg 6IAL30APHY Sodium Tetraphenylboron,1949-1955:A Comprehensive Bibliography DE③oTCFY jUGGeSONS NOTEs F NT9RESi AnalystR Phillipsburg,New Jersey R.F.MURACA,Tech.Editor R.V.MORROW,Circulation # Table of Contents Cover Illustration…………"Chemical Development"(See page 107 for story) Page 86 …………………………………………………………….Charles Mader 87 ………………… ………… ……·J.P.Mehlig 89 Tungsten ………………… …………………I.M.Issa and A.M.Daess 91 Formaldehyde Sulfoxylate(Rongalite)…..F.Feigl and Cl.Costa Neto 94 dithiocarbamate-Salt Mixture.……Seton N.Edson and Lewis E.Watson 95 ………………Saul Gordon and James M.Schreyer 96 ………Kuang Lu Cheng and T.R.Williams,Jr. 98 Manganous Solutions with Permanganate ……I.M.Issa and R.M.Issa '99 103 104 …………………A.J.Barnard,Jr. A Convenient Drying Apparatus…………… ……………… ………C.A.Knight 108Constant Temperature Bath for Reaction …Earl Usdin and Vera Usdin 108Modification of Magnetic Stirritg Bar for Use in Round-Bottom Vessels 109 … …………·………………………………A.G.Pinkus Labeling Plastic Bottles……………… ………………………Richard E.Truett111Simple Chamber for Paper Chromatography……………Carlos M.P.Wirth 111Storing Reagent Bottles in Polyethylene Bags……… ………R.F.Muraca 111Filtration Aid.……………… ………………Hugh C.Austin,Jr.112 Standard Methods for Examination of Water,Sewage &Industrial Wastes ...107Cover Illustration(Story)………………… …107Reprints Available;Sine qua non ...;Ackno

FAQs

What problem does the text address in fluoride analysis?

It addresses interference caused by slightly soluble deposited lead salts in an alcoholic 5-phenylsalicylic acid-iron(II) color system buffered at pH 2.

Why is thioacetamide presented as a preferred sulfide source?

Because it is easy to use and free from the noxious and corrosive hazards associated with hydrogen sulfide, while providing sulfide ions for separation of heavy metal ions.

How does the cation exchange resin approach help with lead interference?

It replaces interfering lead by using an ion exchange resin so the lead is removed as an interfering species and substituted with a non-interfering ion.

Sep 28, 2026

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