A new method based on inductively coupled plasma atomic emission spectrometry (ICP-AES) was used for the simultaneous determination of five kinds of inorganic builders in powder detergents. For the determination of water soluble inorganic builders (silicate, phosphate, and borate), detergents were dissolved in water and specific elements (Si, P, and B) of the builders in a sample solution were indicated by ICP-AES. Zeolite and calcium carbonate were insoluble in water. Thus, for their determination, detergents were dissolved in diluted nitric acid and specific elements (Al and Ca) in the solution were found by ICP-AES. Anionic and nonionic surfactants had no effect on the emission intensity of specific elements. The coexistence of sodium ions i. e., counter ions of builders and anionic surfactants, presented no problem. Increase in the concentration of nitric acid, used for preparing a sample solution, in the analytical solution decreased the emission intensity of Si, P, Al, and Ca. This situation could be eliminated by the matrix-matching method. Values obtained for inorganic builders in several commercial detergents by the present method good agreements with those by conventional methods.
Examination was made of the addition reactions of dihydromyrcene (1), α-terpinene (2), and α-phellandrene (3) with C1C4 alcohols in the presence of synthetic zeolites. In methanol with HSZ-330 HUA synthetic zeolite at 60°C, the addition of (1) gave 7-methoxy-3, 7-dimethyl-1-octene (4) with high selectivity (98 % at optimum). In 1-propanol with HSZ-600 HOA synthetic zeolite, 2-propoxy-3-p-menthen-1-ol (17) and 1-propoxy-3-p-menthen-2-ol (18) were obtained with high selectivity from (2). The addition of (3) gave 1-alkoxy-5-p-menthene-2-ol compounds as the major products. These compounds were examined for their odor (6), (7), and (18) emitted odors demonstrating their applicability as flavor ingredients.
Analysis was made of the precipitate formed during the settling of crude sesame seed oil. It was found mainly to consist of dicarboxylic acid (DA, 78%), sterylglycoside (SG, 7%), and non-lipid (7%). About 92% of DA was octacosanedioic acid and four other DA with different carbon numbers. DA and SG content in crude oil was about 0.5% and 700 ppm, respectively. DA and SG were removed for the most sort from the crude oil as the precipitate.