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Methods for the analysis of silicate glasses are described for ferrous iron, for tri‐ and pentavalent arsenic and antimony when present together, and for selenium as Se 2‐, Se, Se 4+, and Se 6+.Analytical results are presented for FeO in the range 0 to 0.25%; for total As and Sb as tri‐oxide, 0.1 to 1.25%; and for total Se, 0.05 to 0.25%. Here, a continuous hydride generation system using sodium borohydride was investigated for the determination of arsenic and antimony by He-GD–OES. The main objective was to compare HC and FC systems both with dc and rf sources, using several emission lines for the determination of each element under study.

Determination of Several Valences of Iron, Arsenic and

Methods for the analysis of silicate glasses are described for ferrous iron, for tri‐ and pentavalent arsenic and antimony when present together, and for selenium as Se 2‐, Se, Se 4+, and Se 6+.Analytical results are presented for FeO in the range 0 to 0.25%; for total As and Sb as tri‐oxide, 0.1 to 1.25%; and for total Se, 0.05 to 0.25%.

5.1 Because of the association with lead and arsenic in industry, it is often difficult to assess the toxicity of antimony and its compounds. In humans, complaints referable to the nervous system have been reported. In assessing human cases, however, the possibility of lead or arsenic poisoning must always be borne in mind.

Submicrogram quantities of antimony, arsenic, and selenium in coal samples are determined by an atomic absorption procedure using an electrically heated graphite atomizer. The samples are decomposed in a mixture of nitric, sulfuric, and perchloric acids and are separated and concentrated by extraction from sulfuric acid-iodide solution into toluene.

The calibration curves of arsenic, tin and antimony were linear in the range from 10ng to 80ng. The detection limits (S/N=2) were 2ng, 1ng and 2ng for arsenic, tin and antimony, respectively. This analytical method was used for the determination of arsenic, tin and antimony in foods.

important for production of pure arsenic trioxide to determine the solubility of arsenic trioxide in concentrated sulfuric acid and to examine the contamination with antimony. Recently, arsenic and antimony contents tend to increase in a conventional electrolyte for the electrorefining of copper. The

Optimization of the Operation Parameters of an Inductively

The mean values of the results of the ICP AES determination of the concentrations of arsenic and antimony in standard samples of the composition of ferrotungsten, ferromolybdenum, and alloy steel obtained at the optimized operation parameters of the spectrometer are closer to the certified values of analyte concentrations.

The analytical results of arsenic and antimony in spring waters at several sites in Japan by this method were in good agreement with those obtained by the hydride generation AAS. KW - coprecipitation of zirconium hydroxide. KW - determination of arsenic and antimony in spring water. KW - reduction of arsenic and antimony with potassium bromide

Arsenic, antimony and bismuth in gold ores were simultaneously determined by inductively coupled plasma optical emission spectrometry (ICP-OES) with spectral lines of 188.980, 206.834 and 223.061nm as analytical line respectively, under preset instrumental parameters. The linear range of the method for arsenic, antimony and bismuth was 0~80ug/mL and the correlation coefficient was greater than

Determination of arsenic, antimony, and selenium by FI-HG-AAS in foods consumed in Slovakia 85 Volatile arsenic, antimony, and selenium were generated in a FIAS 400 flow injection analysis system (Norwalk, Connecticut, USA), trans ported by means of an argon carrier gas to a quartz cell of the Perkin–Elmer 4100 atomic absorption

and subsequent determination of organoarsenicals has very recently been undertaken using microwave digestion followed by UV irradiation, hydride generation, and fluorescence spec-trometry (244). This is similar to microwave-assisted extraction of arsenic in soils (114). There is a wide difference in the arsenic level of marine and terrestrial organisms.

arsenic glass method antimony Prior art date 2016-07-21 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Active, expires 2036-11-10 Application number US15/216,048 Other versions US20180023165A1 (en Inventor

1.1. Arsenic and Antimony in the Environment 1.1.1. Arsenic Arsenic is a natural element in the environment. It can be found in soil and in many kinds of rock, especially in minerals and lead and copper ores. It may be released from wind-blown dust and may reach water from runoff and leaching, and during the mining and smelting of these ores.

The detection limits of this method were 1.8 ng dm −3 for arsenic and 9.4 ng dm −3 for antimony in the case of 100‐cm 3 sample volumes. Therefore, it is suitable for determination of trace arsenic and antimony in natural waters.

Microbial methylation of metalloids: arsenic, antimony

Microbial methylation of metalloids: arsenic, antimony, and bismuth. [Ronald Bentley, Thomas G Chasteen] Further research in biomethylation has been facilitated by the development of delicate techniques for the determination of arsenic species. As described in this review, many microorganisms (bacteria, fungi, and yeasts) and animals are

The mean values of the results of the ICP AES determination of the concentrations of arsenic and antimony in standard samples of the composition of ferrotungsten, ferromolybdenum, and alloy steel obtained at the optimized operation parameters of the spectrometer are closer to the certified values of analyte concentrations.

There are many methods for the determination of anti-mony and arsenic in various matrices. Hydride generation atomic absorption spectrometry (HGAAS) is probably the most popular technique for the determination of arsenic and antimony, either directly or after a suitable pretreatment step. An important advantage of HGAAS is the separation of the

In the simultaneous determination of arsenic, antimony, bismuth, selenium and tellurium by measurement of the atomic line emission from the elements in an inductively coupled plasma source after their introduction as the gaseous hydrides, two types of

May 25, 2006Dimethyl and monomethyl arsenic and antimony (DMAS, DMSb, MMAs, and MMSb) were simultaneously determined using the total inorganic As and Sb procedures above (except no KI was added), including the addition of sulfanilamide, but using a different gas chromatography column (15% OV‐3 on Chromasorb W/AW DMCS, 80/100 mesh).

The concentration speciation of chromium (Cr(III), Cr(VI)), arsenic (As(III), As(V), AsB, MMA, DMA)) and antimony (Sb(III), Sb(V)) forms were determined by HPLC-ICP-MS. The optimized separation and determination parameters for the arsenic, antimony and chromium forms are given in Table 3. The method validation parameters are shown in Table 4. The following substances were used for

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