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Influence of carrier gas nature and pressure on the relative retention of organic compounds in capillary GLC was theoretically considered. The obtained linear equations for the dependence of relative retention on average column pressure of carrier gas conformed well to experimental values. New invariant retention values at carrier gas pressures approaching zero were suggested. It was shown that...
Use of the Rock-Eval method for assessment of oil-contaminated soils. In terms of analysis of soils polluted by either petroleum products or by hydrocarbon compounds, the most current techniques used to quantify and characterize the pollutants are infrared spectrometry (IR) and gaseous phase chromatography (GC). They involve the use of pre-analytical time-consuming phases (transportation, solid/liquid...
In this work we have investigated a multi-element analytical method for the determination of the levels of trace metals in estuarine waters by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES). Gallium, in association with magnesium, coprecipitation was used for trace metal (Cr, Fe, Mn, Mo, V and Zn) preconcentration. Several parameters associated with the analytical procedure (pH,...