propionic anhydride


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propionic anhydride

[¦prō·pē¦än·ik an′hī‚drīd]
(organic chemistry)
(CH3CH2CO)2O A colorless liquid with a boiling point of 167-169°C; soluble in ether, alcohol, and chloroform; used as an esterifying agent and for dyestuffs and pharmaceuticals.
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9 -1 mL of Methanol Dry: -5 min at 10 inches of Mercury Elute: -1 mL 7:2:1 Ethyl Acetate/Isopropanol/Ammonium Hydroxide -Evaporate to dry at <40 C Derivatization: -Reconstitute sample in 50 [mu]L of Pyridine and 50 [mu]L of Propionic Anhydride, vortex -React mixture at 60 C for 30 min -Allow sample to cool and then dry -Reconstitute in 50 [mu]L of Ethyl Acetate TABLE 1.
Methoxyamine hydrochloride, 2,4-dimethylaminopyridine, and propionic anhydride were obtained from Sigma.
The eluates were dried under nitrogen at 40 [degrees]C, the extracted residues were reconstituted with 100 [micro]L of 1 g/L propionic anhydride in pyridine, and the capped tubes were heated for 20 min at 70[degrees]C.
Solid phase extraction of opiates in urine using the Zymark Rapid Trace and derivatization with pentafluoroben-zylhydroxylamine and propionic anhydride followed by GC/MS analysis [Abstract].
Propionic anhydride and pentafluoropropionic anhydride were purchased from Aldrich Chemical Co.
The extracts in the 10-mL glass tubes were dissolved in 50 [micro]L of propionic anhydride and 50 [micro]L of dry pyridine.