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A new approach to titrimetry
914
Ot,R t1983} ~0 1t2!
C. CHEMICAL OCEANOGRAPHY CI0. Apparatus and methods
C80. Physical chemistry in seawater
83:6675 Bartels, H. and P. Walser, 1983. A new approach to titrimetry. Z. analyt. Chem.. 315(2):109-112.
83:6680 Balistrieri, L.S. and J.W. Murray. 1983. Metal-solid interactions in the marine environment: estimating apparent equilibrium binding constants. Geochim. cosmochim. A eta. 47(6): 1091 - 1098
This new, automated titration system uses a stopflow technique wherein 'aliquots of sample are mixed with aliquots of titrant, measured and discarded.' The flow-through system is quick (1 4 rain) with 'outstanding' reproducibility (_+0.2% S.D.); permits sequential, routine titration analyses without pipetting; has a high degree of accuracy: and reduces the number of measured increments to find the endpoint to 4-10 (from ~30). Central Analy. Dept., CIBA-Geigy Ltd., CH-4002 Basel, Switzerland. (bwt) 83:6676 Maher, W.A., 1983. Fluorimetric determination of selenium in marine geological materials. Analyt. Letts, (A)16(6):491-499. Dept. of Phys. and Inorganic Chem., Univ. of Adelaide, SA 5001. Australia.
C40. Area studies, surveys 83:6677 Belzile, N. and J. Lebel, 1983. Chemistry of dissolved and particulate material in the Rimonski River Estuary [east Canada]. Mar. Chem., 13(1): t5-34. (In French, English summary.) Dept. d' Oceanogr., Univ. du Quebec a Rimouski, Quebec G5L 3AI, Canada.
83:6678 Epifanio, C.E., D. Maurer and A.I. Dittel, 1983. Seasonal changes in nutrients and dissolved oxygen in the Gulf of Nicoya, a tropical estuary on the Pacific coast of Central America. Hydrobiologia, 101(3):231-238. Coll. of Mar. Studies, Univ. of Delaware, Lewes, Del. 19958, USA. 83:6679 Friligos, Nikolaos, 1983. Nutrient and oxygen redistribution during destratification in the Elefsis Bay [Greece], an anoxic basin. Hydrobiologia, 101(3): 223-230. Inst. of Oceanogr. and Fish. Res., Agios Kosmas Hellinikon, Athens, Greece.
Surface chemistry concepts are illustrated w~th ( m Cd, and Zn adsorption data on a well-defined, model surface--goethite--and then are applied to define the interaction of Zn with interfacial sediments from the Guatemala Basin. Apparent equilibrium binding constants which describe metal associations with a surface, whose sites are composed of a spectrum of binding energies, are independent of adsorption density when sites are available in excess, but dependent when sites are limited. A mean~, f,'~r estimating the maximum adsorption density of an element on natural particles is discussed. Sch. of Oceanogr., Univ. of Washington, Seattle. Wash 98195. USA. 83:6681 Pytkowicz, R.M., 1983. Thoughts on ' M g S O 4 ion association in seawater' by Fisher, Gieskes and Hsu. Mar. Chem., 13(I):73-74. S c h of Oceanogr., Oregon State Univ., Corvallis, Oreg. 97331, USA.
CI10. Radioactivity, radioisotopes 83:6682 l'urekian, K.K., L.K. Benninger and E.P. Diom 1983.7Be and 2t°Pb total deposition fluxes at New Haven, Connecticut and at Bermuda. J, geophys. Res., 88(C9):5411-5415. Dept. of G e o l and Geophys., Yale Univ., New Haven, ('onn. 06511, USA.
C130. Organic compounds 83:6683 Fox, L.E., 1983. The removal of dissolved hmnic acid [DHA] during estnarine mixing. Estuar. coast. Shelf Sci., 16(4):431-440. A simple method based on C analysis was used to measure the distribution of D H A in 7 U.S. east coast estuaries. Results indicate that 100% of DHA was
Ot,R t1983} ~0 1t2!
C. CHEMICAL OCEANOGRAPHY CI0. Apparatus and methods
C80. Physical chemistry in seawater
83:6675 Bartels, H. and P. Walser, 1983. A new approach to titrimetry. Z. analyt. Chem.. 315(2):109-112.
83:6680 Balistrieri, L.S. and J.W. Murray. 1983. Metal-solid interactions in the marine environment: estimating apparent equilibrium binding constants. Geochim. cosmochim. A eta. 47(6): 1091 - 1098
This new, automated titration system uses a stopflow technique wherein 'aliquots of sample are mixed with aliquots of titrant, measured and discarded.' The flow-through system is quick (1 4 rain) with 'outstanding' reproducibility (_+0.2% S.D.); permits sequential, routine titration analyses without pipetting; has a high degree of accuracy: and reduces the number of measured increments to find the endpoint to 4-10 (from ~30). Central Analy. Dept., CIBA-Geigy Ltd., CH-4002 Basel, Switzerland. (bwt) 83:6676 Maher, W.A., 1983. Fluorimetric determination of selenium in marine geological materials. Analyt. Letts, (A)16(6):491-499. Dept. of Phys. and Inorganic Chem., Univ. of Adelaide, SA 5001. Australia.
C40. Area studies, surveys 83:6677 Belzile, N. and J. Lebel, 1983. Chemistry of dissolved and particulate material in the Rimonski River Estuary [east Canada]. Mar. Chem., 13(1): t5-34. (In French, English summary.) Dept. d' Oceanogr., Univ. du Quebec a Rimouski, Quebec G5L 3AI, Canada.
83:6678 Epifanio, C.E., D. Maurer and A.I. Dittel, 1983. Seasonal changes in nutrients and dissolved oxygen in the Gulf of Nicoya, a tropical estuary on the Pacific coast of Central America. Hydrobiologia, 101(3):231-238. Coll. of Mar. Studies, Univ. of Delaware, Lewes, Del. 19958, USA. 83:6679 Friligos, Nikolaos, 1983. Nutrient and oxygen redistribution during destratification in the Elefsis Bay [Greece], an anoxic basin. Hydrobiologia, 101(3): 223-230. Inst. of Oceanogr. and Fish. Res., Agios Kosmas Hellinikon, Athens, Greece.
Surface chemistry concepts are illustrated w~th ( m Cd, and Zn adsorption data on a well-defined, model surface--goethite--and then are applied to define the interaction of Zn with interfacial sediments from the Guatemala Basin. Apparent equilibrium binding constants which describe metal associations with a surface, whose sites are composed of a spectrum of binding energies, are independent of adsorption density when sites are available in excess, but dependent when sites are limited. A mean~, f,'~r estimating the maximum adsorption density of an element on natural particles is discussed. Sch. of Oceanogr., Univ. of Washington, Seattle. Wash 98195. USA. 83:6681 Pytkowicz, R.M., 1983. Thoughts on ' M g S O 4 ion association in seawater' by Fisher, Gieskes and Hsu. Mar. Chem., 13(I):73-74. S c h of Oceanogr., Oregon State Univ., Corvallis, Oreg. 97331, USA.
CI10. Radioactivity, radioisotopes 83:6682 l'urekian, K.K., L.K. Benninger and E.P. Diom 1983.7Be and 2t°Pb total deposition fluxes at New Haven, Connecticut and at Bermuda. J, geophys. Res., 88(C9):5411-5415. Dept. of G e o l and Geophys., Yale Univ., New Haven, ('onn. 06511, USA.
C130. Organic compounds 83:6683 Fox, L.E., 1983. The removal of dissolved hmnic acid [DHA] during estnarine mixing. Estuar. coast. Shelf Sci., 16(4):431-440. A simple method based on C analysis was used to measure the distribution of D H A in 7 U.S. east coast estuaries. Results indicate that 100% of DHA was