.... Trofimova, Institute of Geology and Mineralogy, Novosibirsk); those of sulfate ions, by the turbidimetric method (RD 52.24.405-95, 1995); and concentrations of hydrocarbonate ions, by the titrimetric method (analyst N.V. Yurkevich, Institute of Petroleum Geology and Geophysics, Novosibirsk...

...-10,000 ppm barium. This simple, rapid, and inexpensive geochemical-prospecting method has been used to study barite deposits in Arkansas. 'Deposits in the commonly steeply dipping Stanley Shale tend to be uniform in grade and are surrounded by thin halos of outwardly decreasing barium content, rarely...

..., which are traditionally considered dissolved solutes, has largely been hindered due to the lack of reliable methods. In this study, we developed a simple and efficient methodology of using size-dependent correlations between nephelometric turbidity and mass concentrations of colloids for quantifying...

... papers. During the period of analyses the samples were kept at 3°C in the cold room facility of School of Environmental Sciences, Jawaharlal Nehru University. Filters were dried and suspended sediment concentrations were determined. Sulphate concentration was determined by the turbidimetric method...

... contamination, as suggested, safe drinking water can be identified immediately. Unlike arsenic, which occurs in minute quantities and generally requires laboratory analysis, sulfate is a major ion component of groundwater whose concentration can be determined in the field by using a simple turbidimetric method...

... spectrophotometer (GEC 906) after calibrating the instrument with salt standards. Ca and Mg were analysed in the absorbance mode and Na and K in the emission mode. The molybdosilicate method and turbidimetric method (APHA, 1985) was used to measure the concentration of dissolved silica and sulphate respectively...

... aggregates to measure WDC (or mechanically dispersed clay) after 3 min of end-over-end shaking followed by sedimentation and turbidimetric determination. Kjaergaard et al. (2004) used a low-energy method to determine the release of WDC from repacked 100-cm 3 soil cores at different matric potentials...

... concentration was monitored by using the silico-molybdate blue method, and the sulfate concentration in the fluid phase was determined by using a turbidimetric method ( American Public Health Association, 1965 ). Changes in the mineralogy of the sediment were determined by X-ray diffraction of powder...

... SO 4 mg/L Titration with H 2 SO 4 mg/L Cl − Titration with AgNO 3 mg/L Turbidimetric method, using spectrophotometer mg/L Phenol method, using spectrophotometer mg/L F − Spadens zirconium-alizarian method, using spectrophotometer mg/L ...

... Electrode. The concentration of K, Ca, Na, Mg, Zn, Fe, Mn, and Cu was measured by flame atomic absorption spectrometry (Varian 240 FS). Phosphorus was determined by the colorimetric method and SO 4 by the turbidimetric method both using spectrophotometer (Spectronic GENESYS 20, Thermo Scientific...

.... 1961 , Suggested methods for turbidimetric determination of sulfate in water: Journal of the American Water Works Association , v. 53 , p. 873 . 0012-821X(2008)269[0366:HCAMPM]2.0.CO;2 Sefton-Nash E...

... 2 - by the turbidimetric method, and P O 4 3 - , N O 3 - , N O 2 - , N H 4 + by the photometric method. The analysis of the main anionic composition (Cl – , P O 4 3 - , N O 3 - , N O 2 - , S O 4 2...

... (ORION model 1260) while SO 4 2− concentration was determined following turbidimetric method ( APHA, 1995 ) employing UV-visible spectrophotometer. The pH and EC were measured in the field. The concentrations of Al, Ca, Cd, Cu, Fe, Mg, Ni, Pb and Zn were determined from acidified samples using...

...{document} , CN − ) and to provide an initial estimate of arsenic concentrations in water. A colour reaction, a violet polymethine dye formation in the presence of barbituric acid and pyridine, was used for cyanide-ion determination. Sulphate-anion was determined turbidimetrically with barium chloride...

... to a pyrite standard ( Larsen, 1994b ). Effort was made to analyze individual crystals. Operating conditions were 15 keV acceleration, 10 nA beam current, and 5–10 μm beam diameter. Sulfate contents in acid digestion solutions from carbonate laminae in samples were determined using a turbidimetric analysis...

... by the Argentometric Method , 2004 [in Russian]. ERD F 14.1: 2.96-97. Rostov-on-Don . Procedure for Measuring of Mass Concentration of Sulfate Ions in Samples of Natural and Wastewater by the Turbidimetric Method , 2005 [in Russian]. ERD F 14.1: 2.159-2000, Moscow . Pronin , N.M. , Ubugunov , L.L...