Kanto Kagaku

Kanto Kagaku Kabushiki Kaisha (K. Murata, J. Hori, M. Yoshida), EP Appl. 834.514. 

Rose Bengal (4,5,6,7-tetrachloro-2 ,4 ,5 ,7 -tetraiodofluorescein disodium salt RB), Polypepton fine granules, magnesium sulfate heptahydrate, agar powder were purchased from Wako Pure Chemical Industries Co., Ltd. (Osaka, Japan) and yeast extract from Kanto Kagaku Co., Ltd. (Tokyo, Japan). 

Chemicals used for this study were highest grade or HPLC grade and were used as received benzene (99%) and phenol (99%) from Katayama Chemicals acetonitrile (99%) from Nacalai Tesque Inc. BPA standard (99.9%) from Kanto Kagaku 2-nitrobenzaldehyde (>98%) from Tokyo Kasei Kogyo Co., Ltd. Sodium nitrate (99.9%, Katayama Chemicals) was used after... 

Materials. Ibe polymer substrates used for grafting were fPTFE plates (thickness = 1.0mm) obtained from Furon Kogyo Co. (Japan). The fPTTE plates were cut into 2 X 6 cm and washed in water, methanol and acetone for 3 hours in an ultrasonic washing machine, respectively, and then dried under reduced pressure. NIPAAm was purified by recrystallization and DMA was purified by distillation under reduced pressure. JV,JV -methylenebisaaylamide (Bis Kanto Kagaku Co. Ltd.), iV , i r",iV"-tetramethyl ethylenediamine (TEMED, MI CK Co. Ltd.), N,N -azobisisobutylonitrile(AIBN Wako Chemical Co. Lhl.) and benzophenone(Wako Qiemicai Co.Ltd.) were used without purification. 

Fifty pesticides were selected and their reference calibrants of garanteed grade or equivalent were obtained from Kanto Kagaku (Tokyo, Japan), Hayashi Pure Chemical (Osaka, Japan), and Wako Pure Chemical (Osaka, Japan). Each stock solution (500mg/L) of the individual pesticide was prepared in acetone. Portions of all the stock solutions were combined in a volumetric flask and made up with acetone to prepare a mixed standard solution. Pesticides concentrations of working solutions for LC/MS analysis were prepared between 0.02 and 1 mg/L using acetnitrile. 

Test samples. Dolomite produced in Kuzuu, Tochigi Pref., was used. It was burnt at 973-1073 K for 4 h. Burnt materials were ground with a mill to obtain the mean particle diameter of 18 pm. To obtain comparison data, using MgO, CaCOs, Mg(OH)2 (by Kanto Kagaku Inc.), slaked lime (by Yoshizawa Lime Industry Co., Ltd.,). 

Triehlorosilane was supplied by Tokyo Kasei Kogyo Co., and dichloromethylsilane and H-PDMS, HSi(CH3)20-[Si(CH3)20] -(CH3)2Si-H (number average molecular weight, M , = 580 and 6) and Pt2[(CH2=CH(CH3)2Si)20]3 (0.1 mol/L in xylene) were purchased from Aldrich. Triehlorosilane and dichloromethylsilane were distilled under reduced pressure. Toluene, -hexane and tetrahydrofuran were supplied by Kanto Kagaku Co. Methanol, FeCls, CaCl2, -xylene and H2PtCl6 6H20 were purchased from Wako Pure Chemical Industries. Distillation of toluene, p-xylene and tetrahydrofuran was performed with sodium and benzophenone. 

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