914 Ot,R t1983} ~0 1t2!

C. CHEMICAL OCEANOGRAPHY

CI0. Apparatus and methods

83:6675 Bartels, H. and P. Walser, 1983. A new approach to

titrimetry. Z. analyt. Chem.. 315(2):109-112.

This new, automated titration system uses a stop- flow technique wherein 'aliquots of sample are mixed with aliquots of titrant, measured and dis- carded.' 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, Switzer- land. (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. Hydro- biologia, 101(3):231-238. Coll. of Mar. Studies, Univ. of Delaware, Lewes, Del. 19958, USA.

83:6679 Friligos, Nikolaos, 1983. Nutrient and oxygen redis-

tribution 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.

C80. Physical chemistry in seawater

83:6680 Balistrieri, L.S. and J.W. Murray. 1983. Metal-solid

interactions in the marine environment: esti- mating apparent equilibrium binding constants. Geochim. cosmochim. A eta. 47(6): 1091 - 1098

Surface chemistry concepts are illustrated w~th ( m Cd, and Zn adsorption data on a well-defined, model surface--goethi te--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 'MgSO 4 ion

association in seawater' by Fisher, Gieskes and Hsu. Mar. Chem., 13(I):73-74. Sch 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 Geol 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 DHA in 7 U.S. east coast estuaries. Results indicate that 100% of DHA was