Wootthikanokkhan, "Modification of cassava starch by using propionic anhydride
and properties of the starch-blended polyester polyurethane," Carbohydrate Polymers, vol.
Strata-X-C 30 mg/3 mL SPE Tubes (Part Number: 8B-S029-TBJ) Condition: -1 mL of Methanol -1 mL of Water Load: -To 1 mL of Urine, add 1 mL of 100 mM Sodium Acetate Buffer at pH 5.8-5.9 Wash: -1 mL of 100 mM Sodium Acetate Buffer at pH 5.8-5.9 -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.
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.