Preparation of a didecyldimethylammonium chloride standard for the determination of DDAC content in commercial products|An investigation of the didecyldimethylammonium chloride content of sapstain control products
The didecyldimethylammonium chloride (DDAC) content of six Bardac 2280 samples (Lonza Inc.), the commercial DDAC concentrate, was determined and found to be variable. Because of the uncertain DDAC content of the Bardac used to calibrate the HPLC, solid DDAC was prepared and characterized using Pyrolysis/GC/MS, HPLC, carbon, hydrogen and nitrogen analysis and NMR spectroscopy. Bardac 2280 was analyzed using the solid DDAC calibration standard and found to contain 68 - 76% DDAC.