Showing papers in "Marine Chemistry in 1973"

TL;DR: In this article, a method is described for the determination of organic carbon in liquid seawater samples by combustion at a high temperature, which has been successfully employed for a direct comparison to the standard method of persulfate oxidation.

TL;DR: In this article, the carbon isotope composition of the particulate matter from the cold polar surface waters was lighter ( −24·7 to −26·0‰ ) than that from the surface in the semi-tropical regions ( −19·8 to −22·3 ‰ ), reflecting the temperature effect on the photosynthetic fixation of carbon.

TL;DR: All the studied elements, except nickel, reached highest concentrations in harbour specimens from Aberystwyth and Aberaeron where rivers draining mineralized areas enter the sea, probably reflecting levels of metabolic activity and climatic factors.

TL;DR: In this article, a new dry combustion method for the simultaneous determination of total organic carbon and nitrogen in seawater is presented, which yields CN ratios for total organic matter of 5 and 12 respectively.

TL;DR: The rare-earth distribution has been determined in five manganese nodules from a range of marine environments as discussed by the authors, and the distribution of U and Th in the nodules is controlled by factors similar to those controlling the rare earth abundance in nodules.

TL;DR: In this article, the apparent solubility product of calcite in artificial seawater of salinity 35‰ was measured by a saturometer technique and it was found to be (4·59 ± 0·05) × 10−7 moles/(kilogram of seawater)2 at 25°C with a temperature coefficient of −0·0108 × 10 −7/°C between 2 and 25°c.

TL;DR: The ion product of water in seawater and the total activity coefficients of hydroxide and hydrogen ions were determined over the temperature range 2° to 35°C, and the salinity range 20‰ to 44‰.

TL;DR: In this article, a correction formula was derived to evaluate the change in partial pressure of carbon dioxide in seawater upon heating, where the constraints on the heating process were constant salinity, total alkalinity, and total carbon dioxide concentration.

TL;DR: In this paper, it was shown that the values of pK1C and pK2C for carbonic acid, pKB for boric acid and the ionic product of water, pKw, in sea water may be explained on the basis of their determination in 0.7 Mw sodium chloride and the formation of the following ion-pairs: NaSO4−, MgSO4, CaSO4+, CaSO 4+, MgCO3, CaCO3+, CaHCO3+ and CaB(OH)4+, M

TL;DR: In this paper, the concentrations of Si, Al, Ti, Fe, K, Ca, Mg, P and Mn, before and after chemical leaching, in particulate matter from waters off the west coast of Scotland have been measured in vertical profiles at two seasons.

TL;DR: In this article, the authors used the Bronsted-Guggenheim hypothesis of specific ionic interaction to develop a chemical model for the major electrolyte components in seawater.

TL;DR: In this article, a magnetic float densitometer was used to measure the density of artificial seawater at 1 atm.p.m. from 0 to 40°C (in 5° intervals).

TL;DR: The residual electrode potential between dilute pH buffers and 0.725 molal NaCl was estimated to be −3.2 mV in this article, consistent with the operational activity coefficient of the hydrogen ion in seawater.

TL;DR: In this paper, an equation for the chemical potential of seasalt (R T ln as) as a function of salinity is derived from isopiestic and potentiometric data, via the Gibbs-Duhem equation and a simple ion-interaction theory.

TL;DR: The IR and NMR spectral characteristics of choline sulfate (ester) are reported for the first time.

TL;DR: The area distribution of carbon dioxide in the surface waters of the Pacific Ocean from 19°N to 55°N latitude and in the Bering Sea is presented in this paper. But the authors do not consider the effect of vertical mixing on the PCO2 distribution.

TL;DR: The relative distribution of the total non-aromatic (saturated and olefinic) hydrocarbons and the total saturated hydrocarbon, and their relative distribution in the central Baltic in September 1971, was determined by means of a micro-adsorption detector as discussed by the authors.

TL;DR: In this paper, a process of determination of organic carbon in particulate matter in sea water by dry oxidation and infra-red analysis is described, which was used concurrently with a chromic-acid wet oxidation process upon 123 samples taken at various depths in the Gulf of Guinea, each sample being divided into two equal parts.

TL;DR: In this article, the authors report the budgets of inorganic and total nitrogen and phosphorus based on a recalculation of the existing water balance, and show that humus carried by river runoff probably dominates in the sedimentation of nitrogenous organic matter, while the excess transferred to the layer below the halocline is controlled by the amounts added by runoff and waste disposal.

TL;DR: In this paper, a new technique for adding Winkler reagents to water samples at sea has been developed, and the main features of the ampoules are simpler handling and safer sampling with preserved accuracy.