kieselguhr
1.Excellent cleaning with pasty kieselguhr discharge with no residues in cone.
2.The sample,after being purged by reversed extraction and purified byPVP-kieselguhr column,was enriched through Amberlite XAD-7 column.
3.The order of Df (desorption factor) value was: yellowish red soil>silt-loamy soil>kaoline>perlite>paddy soil (loamy clay) >kieselguhr.
4.The procedure involved extraction of TSNA from tobacco by sonication,elu-tion of extract in a Kieselguhr extraction column ,concentration of elute and determination of TSNA by gas chromatography with a N-P detector.
5.The SiO_2 gelatinate membranes on kieselguhr or Al_2O_3 support were prepared by sol-gel method from tetrathylorthosilicate (TEOS) solutions, the effects of sols concentration, viscosity, gleatination time and the amount of drying control chemical additive (DCCA) added in these solutions on the process of gelatinate membranes formation were investigated.
6.The author gives the general situation of using non-metallic minerals, such as kieselguhr, sepiolite, zeolite and bentonite, as carriers of chemical fertilizers and modifying the fertilizers to become long-acting ones, so as to cause the release of the available constituents of the fertilizers to be in balance with the crop needs, raise the use ratio of these components, and reduce environmental pollution.
