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Date: 2015/02/04
Language: en
Type: Text
Identifier: tut:3314
Description: A method for speciation of vanadium in solid samples was developed for quantification of vanadium(+5) in solid samples of sediment Certified Reference Materials (CRM) PACS-2 and MESS-3 (Trace Elements ... More
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Date: 2015
Language: en
Type: Text
Identifier: tut:3435
Description: Activated carbon prepared from Theobroma cacao pod husk was used as a low-cost biosorbent for the removal of mercury(II) from aqueous solutions. The influence of pH and contact time on the adsorption ... More
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Date: 2014/06/08
Language: en
Type: Text
Identifier: tut:2960
Description: A Zeeman Mercury analyzer Model RA-915+ (Lumex, St. Petersburg, Russia), based on the direct thermal evaporation of Hg from solid samples was used for developing a method for the determination of Hg i ... More
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Date: 2012-06-01
Type: Text
Identifier: tut:1422
Description: The concentration of mercury vapour in ambient air is routinely determined using specialised instruments. As an economical alternative, actively pumped Hopcalite sorbent tubes can be used to trap atmo ... More
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Date: 2010-02-02
Type: Text
Identifier: tut:1424
Description: Solid Certified Reference Materials (CRMs) with known vanadium(+5) content are currently not commercially available. Because of this, vanadium species have been determined in solid CRMs of soil, viz. ... More
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Date: 2009/07/23
Language: en
Type: Text
Identifier: tut:4228
Description: The impact of ferrochrome smelter on the contamination of its environment with toxic hexavalent chromium, Cr(VI), was assessed by analyzing smelter dusts, soil, grass and tree barks. For the separa- t ... More
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Date: 2009/05/13
Language: en
Type: Text
Identifier: tut:4213
Description: The natural leaching of vanadium(V) with CO2 from soil-water in the presence of ammonia, a known precursor to atmospheric aerosols, has been tested by bubbling carbon dioxide through soil suspension w ... More
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Date: 2009-01-22
Subject: Coal slurries | ICP OES
Type: Text
Identifier: tut:1430
Description: The characterisation and stability of coal slurries for introduction into an inductively coupled plasma optical emission spectrometer (ICP OES) and the application of slurries in the analysis of coal ... More
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Date: 2008-12-02
Subject: Herbaria | Health
Type: Text
Identifier: tut:1449
Description: Mercury [Hg] emissions from old plant collections treated with mercuric chloride (HgCl2) may present a high health risk for staff working in certain herbaria. The present study evaluated Hg concentrat ... More
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Date: 2007-07-20
Type: Text
Identifier: tut:1405
Description: The mystery surrounding high concentrations of Cr(III) in plants has been uncovered. It is attributed to the presence of low molecular weight organic acids (LMWOA) in soil in which the plants are grow ... More
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Date: 2006-11-24
Type: Text
Identifier: tut:1404
Description: The level of the generation of hexavalent chromium during ferrochrome productionwas checked. The concentration of Cr(VI) increases with each stage of ferrochrome production, 7070 g g−1 being the highe ... More
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Date: 2006-09-04
Type: Text
Identifier: tut:1407
Description: The distribution of vanadium(V) species between soil and plants around the vanadium mine have been studied. The mine dam spilled water around this area after collapsing some time ago. V(V) species wer ... More
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Date: 2006-03-17
Type: Text
Identifier: tut:1403
Description: The impact of a chromium smelter on pollution was evaluated by determining Cr(VI) in topsoil, grass and tree bark by electhrothermal atomic absorption spectrometry (ETAAS). It was found that bark refl ... More
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Date: 2006/01/24
Language: en
Type: Text
Identifier: tut:2511
Description: A method was developed which allow separate determination of Cr(VI) and total Cr from the same minute sample of atmospheric aerosols. Cr(VI) was leached was with 0.1 M Na2CO3 and the total Cr concentr ... More
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Date: 2005-11-05
Subject: Speciation | Leaching
Type: Text
Identifier: tut:1402
Description: Vanadium(IV) and vanadium(V) were easily separated from each other in the same plant sample and be determined independently by ETAAS (electrothermal atomic absorption spectrometry). This was achieved ... More
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