The ferric hydroxamate colour reaction : The spectrophotometric determination of acetic anhydride

✍ Scribed by K.J. Morgan

• Publisher: Elsevier Science
• Year: 1958
• Tongue: English
• Weight: 835 KB
• Volume: 19
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/s0003-2670(00)88114-3

✦ Synopsis

A previou rcportl has dcseribcd the! direct titration of hydroxyl groups with acetic anhydridc in the prcsc of pcrchloric acid using the formation of ferric: acctohydroxamate, Fc(CH,CO as external indicator, The deep-red colour of the salt and the facility trrith whi~~l it is farces sug ted that in it rni~~t asis of a ~~nv~ni~~t s~cct~o~~~ut~~~~r~~ dctcrm tion of acetic anhyc of hydroxyl groups, Rclatcd spctroscopic methods have bcon c&seribcd : cstcrs' 283 have bcctl dctermincd first by conversion ta hydroxamic acids and then to the corresponding ferric salt and a micro-method for the detection and esti-rn~ti~~ of ~ly~r~xyl~min~4 is based on the f~rm~t~~n of ferric furnlollydroxanlatc. Any ~~t~~l~d ~x~rni~~~~~l~ of tfrcsc r~~ct~o~s has been made d~f~~~u~t by th sarily energetic conditions. The largely diffcrunt iand milder conditions u tigation proved more amenable to such an examination.