Silver nitrate impregnated filter

Figure 2. Sulfide concentrations measured on silver nitrate impregnated filters in series. Data shown from sample collected in Miami on 10/8/86 for 170 min at 7.81/min. The front filter extract was diluted by a factor of four.

Cooper DJ and Saltzman ES, 1987, Uptake of carbonyl sulphide by silver nitrate impregnated filters Implications for the measurement of low level atmospheric H2S, Geophys. Res Lett., 14, 206-209. 

The Gutzeit Test.3—This test is as accurate as the Marsh test and the apparatus necessary is comparatively simple. It consists in allowing the arsine to react with strips or discs of dry filter paper impregnated with silver nitrate or, in the more recent modifications of the method, mercuric chloride or bromide. 

Filter paper impregnated with 5% molybdophosphoric acid Silver nitrate, 1% aqueous soln... 

The principle of reprocessing is as follows ( PUREX process ). The process starts with cutting the fuel rods in pieces of about 5 cm length. The fuel (UO2/PUO2) is dissolved in half-concentrated nitric acid. Radioactive aerosols and radio-iodine set free in the process are retained in filters (aerosols in mechanical filters, iodine in filters impregnated with silver nitrate). Fission rare gases (mainly Kr, Tin = 10.5 years) maybe condensed in cold charcoal filters and filled later into steel cylinders. 

Air is sampled at the place of work for antimony analysis using filter paper (Sartorius type SM 15400) that has been impregnated with 10% aqueous silver nitrate solution and dried [65]. After sampling the filter paper is extracted with 10% HNO3 and the extract analyzed by the AAS hydride technique as described in Sec. 4.3. 

Derivatives are often used in lipid chemistry to prepare fatty acid methyl esters needed to determine the fatty acid composition of lipids. Fried et al. (1992) published a technique on the transesterification of 500-mg samples of snail tissue. Because the technique is applicable to other biological tissues and fluids, it is presented herein. Lipids were extracted from snail bodies with 10 ml of chloroform-methanol (2 1) the extracts were filtered through a plug of glass wool contained in a Pasteur pipet, and nonlipid contaminants were removed by extraction with 8 ml of Folch wash (0.88% aqueous KCl). The lipid-containing lower phase was separated and evaporated just to dryness under a stream of nitrogen at room temperature. The total lipid sample was dissolved in about 30 ml of methanol, and 0.5-1.0 ml of concentrated sulfuric acid was added. The mixture was refluxed for 1 h the formed fatty acid methyl esters were extracted with 30-40 ml of petroleum ether and the extract dried over anhydrous sodium sulfate. The fatty acid methyl esters were concentrated on a Rotoevaporator at 40°C and the volume reduced to 1 ml. The fatty acid methyl esters can be separated by TLC on silica gel impregnated with silver nitrate (Christie, 1982). 

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