Showing papers in "Marine Chemistry in 1976"

TL;DR: In this article, a new gas chromatographic method was developed for the measurement of nitrous oxide (N2O) in seawater, which takes 15 min for the analysis in a sample of 640 ml seawater.

TL;DR: In this article, the iron solubility equilibria were investigated in seawater at 36.22‰ salinity and 25°C using several filtration and dialysis techniques.

TL;DR: In this paper, the chemical forms of Cd, Pb and Cu in seawater have been examined using a novel scheme which permits the quantification of up to seven different species of one metal.

TL;DR: In this paper, the concentrations of total lead were determined in both ordinary coastal seawater and in coastal waters highly polluted with sewage, with the proportion increasing as the amount of sewage in the seawater increased.

TL;DR: In this article, a simple model describing regional variations in the contents of manganese and associated minor metals in deep-sea sediments suggests that solid menganese phases are being removed from the <0.5 μm fraction of seawater at ∼1-7 · 1012g yr−1 in excess of the rate of stream-supplied manganies.

TL;DR: A detailed study of particulate and dissolved cadmium distributions on 83 seawater samples from six profiles in the open North Atlantic Ocean showed a relatively homogenous distribution as mentioned in this paper, with a mean concentration of 60 ± 27 ng/kg.

TL;DR: In this article, the association constants of orthophosphate ion with Na+, Ca2+, and Mg2+ were measured at μ = 0.68 and 20°C.

TL;DR: In this article, an investigation of ferric ion complexing has been conducted in synthetic media and seawater at 25°C, and formation constants were determined for the species FeCl2+, FeCl 2++++, FeOH2+ and Fe(OH)2+ at an ionic strength of 0.68 m. The average values obtained for these constants are ∗ β 1 = 1.93 · 10 −3 and ∗β 2 = 8.6 · 10−8.

TL;DR: This work has developed a method of quick-freezing of whole cells and of cell-free extracts of the diatom, Skeletonema costatum, followed by storage at −60°C for up to one week that can be used for the preservation of ETS activity in the marine copepod Calanus pacificus.

TL;DR: In this article, the relationship existing between the protein-containing fraction of particulate matter and amino acids dissolved in seawater was studied in the Gulf of Marseille at different periods of the year.

TL;DR: The conditional protonization constant of HS− in seawater of different salinities can be used to modify the Gran plots (Hansson and Jagner, 1973) for alkalinity measurements in anoxic seawater.

TL;DR: In this article, an amalgamated silver electrode was used for end-point detection of calcium and magnesium in seawater in the presence of a small amount of mercury(II)-chelonate, which served as a pM indicator during the complexometric titration.

TL;DR: In this paper, the use of small volumes of sample and reagents permits the adaption of a copper-coated cadmium column to the manual analysis of nitrate in seawater.

TL;DR: In this paper, the elements Al, Cd, Co, Cu, Ni and Zn were concentrated from seawater using tetraethylenepentamine resin and analyzed by atomic absorption spectrophotometry.

TL;DR: In this article, experiments on the uptake of Zn and Cd by synthetic hydrous Mn oxides were carried out in an ionic medium at pH 3.5 and at pH 4.

TL;DR: In this paper, the formation of NaF ion-pairs at the ionic strength of seawater using specific ion electrodes was investigated using the stoichiometric association constant for NaF, K ∗ NaF, was determined at 15, 25, and 35°C.

TL;DR: In this paper, the concentrations of trace elements have been established employing the analytical method suggested by Le Meur and Courtot-Coupez (1973), by means of concentration of the sample by chelating resin, solvent extraction of the eluate and then by quantitative determination by AAS.

TL;DR: In this article, the pH buffer capacity of an aqueous system has been evaluated in terms of a set of basic constituents, including the major-minor species rule for zeroth order pH-TOTH interaction.

TL;DR: In this paper, the authors made observations on the chemosynthetic microbial process of nitrification and found that during the oxidation of ammonia to nitrate, hydroxylamine was detected and it seemed to be an unstable intermediate compound in the first phase of marine nitrification.

TL;DR: In this paper, carbon monoxide concentrations were measured in the surface waters of the east tropical Pacific during a cruise aboard USNS Hayes from Ecuador to Panama via Hawaii and Tahiti in the late winter and early spring of 1974.

TL;DR: In this paper, the effects of temperature on the interfacial surface area and on the rate of oxygen transfer from air bubbles dispersed in aqueous NaCl solutions were investigated at 5, 10, 15, 20, 25, and 30°C.

TL;DR: In this article, a method for the determination of total iodine in seawater, which uses a Technicon Auto-Analyser II system and is based on Truesdale and Spencer's (1974) and T. Smith's (1975) earlier works with a catalytic procedure, is described.

TL;DR: In this article, the authors measured Na, K, Mg, Ca, Fe, and Mn in both naturally occurring particulate matter and artificially created aggregates taken from water from the Nova Scotian coastal region and from the North Atlantic Ocean.

TL;DR: In this paper, the authors demonstrate the involvement of dissolved organic compounds in the precipitation of gypsum from near-surface seawater and discuss the general solubility and oxidation behavior of these compounds.

TL;DR: The reliability of chlorinated hydrocarbon measurements in natural marine sediments is assessed statistically for the various sample treatments and quantitation techniques used by ten laboratories as mentioned in this paper, and a standard deviation within ± 25% of the mean can be expected.

TL;DR: In this paper, the advantages of the molal scale are noted, and suggestion made that the mokal scale be used only when there is insufficient information to convert oceanographic data to the Molal scale.

TL;DR: In this article, two sampling devices for the in situ extraction of chlorinated hydrocarbons from water are described, which use the macroreticular adsorbent Amberlite XAD-2.

TL;DR: Measurements of carbon in marine “net zooplankton” were made by use of a Leco 70 Second TC-12 Automatic Carbon Determinator, which employs high-temperature, dry-combustion and thermal-conductivity detection of the purified carbon-dioxide combustion product and oxygen carrier gas mixtures.