Application of Atomic Spectrometric Methods Coupled with Gas Chromatography for Geochemical Exploration

Abstract

This paper presents a scheme of analysis for bottom sediments based on inductively coupled plasma‐atomic fluorescence spectrometry and arc discharge atomic emission spectrometry combined with instrumental pyrolysis and gas chromatographic methods (head space analysis) for determining organic matter. The experimental investigation was performed on bottom sediments of the Kuybyshev and Ivankovo reservoirs on the Volga River, used as a drinking water supply. The selective sample dissolution method followed by the inductively coupled plasma‐atomic fluorescence spectrometry liquid phase analysis and the arc discharge atomic emission spectrometry solid phase analysis was used to obtain quantitative information on heavy metal speciation in bottom sediments. In the present work we have taken the direct extraction scheme for analysis. It is shown that the proposed combination of instrumental methods is highly effective for revealing natural and anthropogenic components in the composition of organic matter, for conducting preliminary estimation of the binding of heavy metals with organic matter and for assessing activity of organic matter biochemical transformation. The proposed approach enlarges the capabilities for prediction and modelling of the processes in environmental‐geochemical investigations.

Ecological-geochemical assessment of the state of the Volga source of water supply to Moscow

“…The chemical phase analysis was carried out via direct extraction scheme with the use of bidistilled water for isolation of water soluble com pounds; 1 M aqueous solution of sodium acetate, acidified by acetic acid to pH 7 for isolation of readily exchangeable ions; aqueous solution obtained by mix ing 1 M sodium acetate solution and acetic acid in proportion 1 : 2 (pH 3.9) used to isolate HMs bound with carbonates; 0.1 M aqueous solution of NaOH used to isolate a fraction of high molecular organic matter of humic nature; 30% aqueous solution of hydrogen peroxide used to isolate sulfides and organic matter; Chester reagent, i.e., 0.8 M aqueous solution of hydroxylamine dissolved in 27% acetic acid, used to isolate Fe and Mn hydroxides; 1% solution of HCl for the isolation of elements bound with clay minerals and organic matter, carbonates, and, partially, hydroxides [19,39].…”

Индексийн Аргуудыг Хөрсний Хүнд Элементийн Бохирдлын Үнэлгээнд Хэрэглэсэн Үр Дүнгээс

“…Элементүүдийн агуулгыг тодорхойлох Pb, Zn, Cd, Mn, Co, Ni, Cr ба Cu -ийн нийт агуулгыг олон сувагт атомын цацаргалтын спектроскопийн нуман атомчлалын хуурай дээжийг нүүрсэн электродын дундуур үлээлгэн атомчлах аргаар тодорхойлсон [21,22 ]. Хөрсөн дэх хүнд элементийн бохирдлын түвшин Улаанбаатар хотын өнгөн хөрсөн дэх хүнд элементийн бохирдлын түвшин, хөрсөн дэх хүнд элементүүдийн бохирдлын хүрээлэн буй орчинд үзүүлэх сөрөг нөлөө, бохирдлын эх үүсвэрийн ялгааг олон улсад хөрсний экологийн ба геохимийн үнэлгээ хийхэд хамгийн түгээмэл хэрэглэдэг бохирдлын индекс (PI), баяжилтын фактор (EF) ба сөрөг нөлөө буюу эрсдлийн фактор (E r ) гэсэн нэг элементийн индексүүдээр үнэлсэн [23][24][25][26][27][28].…”