Lu, Highly Efficient N-formylation of Amines with
Ammonium Formate Catalyzed by Nano-Fe3O4 in PEG-400, RSC Adv.
9 [micro]m), P/N 25502-102130 Mobile Phase A1: 20mM
Ammonium formate in water, pH 3, (P/N
Ammonium formate A114-50) A2: 20 mM
Ammonium formate in water, pH 4 A3: 20 mM Ammonium acetate in water, pH 5, (P/N Ammonium acetate A115-50) A4: 20 mM Ammonium acetate in water, pH 5.
Formic acid,
ammonium formate, and ammonium phosphate were obtained from Sigma Aldrich; LC-MS-grade methanol and acetonitrile from Burdick & Jackson; Strata-X-CW weak cation exchange (WCX) solid-phase extraction (SPE) cartridges (3 mL) from Phenomenex; and Oasis WCX [mu]Elution 96-well SPE plates from Waters.
Eluent A was water and eluent B was acetonitrile--water (95:5), both containing 2 mM
ammonium formate and 50 mM formic acid (Quilliam 2003).
Ten ppb spiked river samples are simply filtered, 10 mM of
ammonium formate is added and then pipetted onto a mesh.
Denoxium is a solution of
ammonium formate and urea and it has a freezing point of -30oC.
Kemira has developed Denoxium, a mixture of urea,
ammonium formate and water--as a fully compatible and interchangeable replacement for urea in such systems.
Ammonium formate (LC-MS grade) was purchased from Sigma-Aldrich Chemie GmbH.
Volatile salts, ammonium acetate and
ammonium formate are used in LCMS applications to improve ionization under neutral conditions in ESI/MS, while acetic acid enhances chromatography separation under acidic conditions.
The enzyme activities for GAA, GLA, and IDUA were compared in sodium formate and
ammonium formate buffers at pH 4.
We obtained acetonitrile and methanol from Carlo Erba, dichloromethane and isopropanol from Prolabo, and formic acid and
ammonium formate from Sigma.
To each well we added 70 /,L of 5 mmol/L
ammonium formate in methanol-chloroform (3:1 by volume), and the sample was infused into the mass spectrometer.
