- Email: [email protected]
Some properties of Nuclepore filters
856
OLR(1980) 27(12)
B. CHEMICAL OCEANOGRAPHY
1. Apparatus and methods 80:5835 Chen, Tar-pin, M. J. DiPirro, Bidyut Bhattacharyya and F. M. Gasparini, 1980. Some properties of Nuclepere filters. Rev. scient. Instrums, 51(6): 846-848.
Polycarbonate membrane filters are characterized by several physical measurements (N2 and He adsorption isotherms, heat capacity, and SEM studies of pore size and distribution). Department of Physics and Astronomy, State University of New York at Buffalo, Amherst, N.Y. 14260, U.S.A.
(bwt) 80:5836 Picer, Nena and M. Picer, 1980. Evaluation of macroreticular resins for the determination of low c o n c e n t r a t i o n s of c h l o r i n a t e d hydrocarbons in seawater and tap water. J. Chromatog.. 193(3): 357-369.
The application of three resins (XAD-2, XAD-4 and Tenax) to the analysis of chlorinated hydrocarbons in water samples was investigated and found to have several limitations including low, unpredictable recoveries and variable blank levels. A concentration step is necessary for the analysis of low concentration levels of insecticides and polychlorinated biphenyls in natural waters, but various uncertainties must be carefully evaluated when using this method. Centre for Marine Research, 'Rudjer Boskovic' Institute, Zagreb, Yugoslavia. (bwt) 80:5837 Simeonov, V., 1980. Critical considerations on the practical application of Orion ionselective electrodes to sea and other natural water samples. Z. analyt. Chem., 301(4): 290293.
The application of potentiometric techniques and ion-sensitive electrodes to the analysis of several anion species (F1, NIL, C1, NO3, Pb) in natural waters is discussed; effects of such factors as salinity, temperature and response time .?+reconsidered. Faculty of Chemistry, University of Sofia, 1126 Sofia, A. Ivanov 1, Bulgaria. (bwt)
80:5838 Sperling, K.-R., 1980. Determination of heavy metals in seawater and in marine organisms by flameless atomic absorption spectrophotometry. XII, A method for the determination of total cadmium in natural water samples: limits of mere extraction methods. Z. analyt. Chem., 30I(4): 294-299.
A new micro-method for the determination of total cadmium in natural waters is described. Small volumes of water are dried, digested in acid, neutralized, extracted with CCL and analyzed by flameless atomic absorption. Detection limit is 2.0 ng L-t; the method eliminates the problem of tightly bound Cd that sometimes 'escapes' detection by other methods. Biologische Anstalt Helgoland, Labor Sulldorf, Wustland 2, D-2000 Hamburg 55, F.R.G. (bwt)
4. Physical chemistry in seawater 80:5839 Davison, W., 1980. A critical comparison of the measured solubilities of ferrous sulfide in natural waters. Geochim. cosmochim. Acts, 44(6): 803+808.
This paper examines the problem of comparing activity coefficients and ferrous sulfide solubility data from waters of different ionic strengths and then defines a new operational solubility product. Solubility products of ferrous sulfide are recalculated from available data; when presented in revised form, values indicate that residence time of the particulate phase in the water body may influence sulfide solubility. Suggestions for improved methods of analysis are made. Freshwater Biological Association, The Ferry House, Ambleside, Cumbria, LA22 0LP, U.K. (bwt) 80:5840 Kitano, Yasushi and Ryoko Fujiyoshi, 1979. Distribution of copper and cadmium between manganese oxide and solution. Geochem. J., 13(5): 21%221.
Laboratory experiments show that copper and cadmium coprecipitate in almost equal amounts but it is suggested that manganese oxide may not
OLR(1980) 27(12)
B. CHEMICAL OCEANOGRAPHY
1. Apparatus and methods 80:5835 Chen, Tar-pin, M. J. DiPirro, Bidyut Bhattacharyya and F. M. Gasparini, 1980. Some properties of Nuclepere filters. Rev. scient. Instrums, 51(6): 846-848.
Polycarbonate membrane filters are characterized by several physical measurements (N2 and He adsorption isotherms, heat capacity, and SEM studies of pore size and distribution). Department of Physics and Astronomy, State University of New York at Buffalo, Amherst, N.Y. 14260, U.S.A.
(bwt) 80:5836 Picer, Nena and M. Picer, 1980. Evaluation of macroreticular resins for the determination of low c o n c e n t r a t i o n s of c h l o r i n a t e d hydrocarbons in seawater and tap water. J. Chromatog.. 193(3): 357-369.
The application of three resins (XAD-2, XAD-4 and Tenax) to the analysis of chlorinated hydrocarbons in water samples was investigated and found to have several limitations including low, unpredictable recoveries and variable blank levels. A concentration step is necessary for the analysis of low concentration levels of insecticides and polychlorinated biphenyls in natural waters, but various uncertainties must be carefully evaluated when using this method. Centre for Marine Research, 'Rudjer Boskovic' Institute, Zagreb, Yugoslavia. (bwt) 80:5837 Simeonov, V., 1980. Critical considerations on the practical application of Orion ionselective electrodes to sea and other natural water samples. Z. analyt. Chem., 301(4): 290293.
The application of potentiometric techniques and ion-sensitive electrodes to the analysis of several anion species (F1, NIL, C1, NO3, Pb) in natural waters is discussed; effects of such factors as salinity, temperature and response time .?+reconsidered. Faculty of Chemistry, University of Sofia, 1126 Sofia, A. Ivanov 1, Bulgaria. (bwt)
80:5838 Sperling, K.-R., 1980. Determination of heavy metals in seawater and in marine organisms by flameless atomic absorption spectrophotometry. XII, A method for the determination of total cadmium in natural water samples: limits of mere extraction methods. Z. analyt. Chem., 30I(4): 294-299.
A new micro-method for the determination of total cadmium in natural waters is described. Small volumes of water are dried, digested in acid, neutralized, extracted with CCL and analyzed by flameless atomic absorption. Detection limit is 2.0 ng L-t; the method eliminates the problem of tightly bound Cd that sometimes 'escapes' detection by other methods. Biologische Anstalt Helgoland, Labor Sulldorf, Wustland 2, D-2000 Hamburg 55, F.R.G. (bwt)
4. Physical chemistry in seawater 80:5839 Davison, W., 1980. A critical comparison of the measured solubilities of ferrous sulfide in natural waters. Geochim. cosmochim. Acts, 44(6): 803+808.
This paper examines the problem of comparing activity coefficients and ferrous sulfide solubility data from waters of different ionic strengths and then defines a new operational solubility product. Solubility products of ferrous sulfide are recalculated from available data; when presented in revised form, values indicate that residence time of the particulate phase in the water body may influence sulfide solubility. Suggestions for improved methods of analysis are made. Freshwater Biological Association, The Ferry House, Ambleside, Cumbria, LA22 0LP, U.K. (bwt) 80:5840 Kitano, Yasushi and Ryoko Fujiyoshi, 1979. Distribution of copper and cadmium between manganese oxide and solution. Geochem. J., 13(5): 21%221.
Laboratory experiments show that copper and cadmium coprecipitate in almost equal amounts but it is suggested that manganese oxide may not