ChemInform Abstract: Silica Gel-assisted Reduction of Nitrostyrenes to 2-Aryl-1-nitroalkanes with Sodium Borohydride.

1983 ◽  
Vol 14 (20) ◽  
Author(s):  
R. T. BORCHARDT
Keyword(s):  
Silica Gel ◽  
Sodium Borohydride

Silica gel-assisted reduction of nitrostyrenes to 2-aryl-1-nitroalkanes with sodium borohydride

1983 ◽  
Vol 24 (3) ◽  
pp. 227-230 ◽  
Author(s):  
Achintya K. Sinhababu ◽  
Ronald T. Borchardt
Keyword(s):  
Silica Gel ◽  
Sodium Borohydride

Simultaneous Gas Chromatographic Determination of Dibutyltin and IHbutyltin Compounds in Biological and Sediment Samples

1986 ◽  
Vol 69 (6) ◽  
pp. 981-984
Author(s):  
Taizo Tsuda ◽  
Hiroshi Nakanishi ◽  
Takashi Morita ◽  
Junko Takebayashi
Keyword(s):  
Gas Chromatography ◽  
Ethyl Acetate ◽  
Simultaneous Determination ◽  
Electron Capture ◽  
Silica Gel ◽  
Sodium Borohydride ◽  
Biological Samples ◽  
Chromatographic Determination ◽  
Sediment Samples

Abstract A method is described for the simultaneous determination of nanogram amounts of dibutyltin and tributyltin compounds in biological and sediment samples. These compounds are converted to the corresponding chlorides with HC1, extracted with ethyl acetate-hexane (3 + 2) for biological samples and with hexane for sediment samples, and hydrogenated with sodium borohydride. The corresponding hydrides, Bu2SnH2 and Bu3SnH, are detected by electron-capture gas chromatography after cleanup by silica gel column chromatography. Detection limits are 1.0-2.0 and 0.5-1.0 ng/g, respectively, for biological and sediment samples.

scholarly journals Investigation of Hopanoid Biomarkers in Lake Sediments by GC-MS and RP-HPLC-APCI-MS

2009 ◽  
Vol 6 (1) ◽  
pp. 77-88 ◽  
Author(s):  
Gamze Kavran Belin
Keyword(s):  
Lake Sediments ◽  
Silica Gel ◽  
Sodium Borohydride ◽  
Periodic Acid ◽  
Swiss Alps ◽  
Anoxic Sediment ◽  
Sediment Samples ◽  
Geological Materials ◽  
Rp Hplc ◽  
Bacterial Lipid

Hopanoids are mainly derived from bacteriohopanpolyols that occur especially in bacteria, show the importance of bacterial lipid contributions in geological materials. In this work, GC-MS and RP-HPLC-APCI-MS analyses of hopanoid biomarkers in oxic and anoxic sediment samples from Lake Cadagno (Swiss Alps) and Lake Voua de la Motte (Haute Savoie, France) are presented and discussed. Samples were ultrasonically extracted, fractionated by flush chromatography on silica gel and derivatised before the analyses. Periodic acid/ sodium borohydride cleavage was used to identify highly functionalised hopanoids

Segmental motion of alkyl chains grafted on silica gel, studied by neutron scattering

1983 ◽  
Vol 44 (4) ◽  
pp. 497-503 ◽  
Author(s):  
J.P. Beaufils ◽  
M. C. Hennion ◽  
R. Rosset
Keyword(s):  
Neutron Scattering ◽  
Silica Gel ◽  
Segmental Motion ◽  
Alkyl Chains
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