Extraction Of Antimony Research Articles

Selective determination of antimony(III) and antimony(V) with ammonium pyrrolidinedithiocarbamate, sodium diethyldithiocarbamate and dithizone by atomic-absorption spectrometry with a carbon-tube atomizer

The extraction behaviour of antimony(III) and antimony(V) with ammonium pyrrolidinedithiocarbamate, sodium diethyldithiocarbamate and dithizone in organic solvents has been investigated by means of frameless atomic-absorption spectrophotometry with a carbon-tube atomizer. The selective extraction of antimony(III) and differential determination of antimony(III) and antimony(V) have been developed. With ammonium pyrrolidinedithiocarbamate and methyl isobutyl ketone, when the aqueous phase/solvent volume ratio is 50 ml/10 ml and the injection volume in the carbon tube is 20 μl, the sensitivity for antimony is 0.2 ng/ml for 1% absorption. The relative standard deviations are ca. 2%. Interferences by many metal ions can be prevented by masking with EDTA. The proposed methods have been applied satisfactorily to determination of antimony(III) and antimony(V) in various types of water.

REDOX SUBSTOICHIOMETRY IN ISOTOPE DILUTION ANALYSIS. I. DETERMINATION OF ANTIMONY IN THE PRODUCT OF RADIOANTIMONY 124Sb

Abstract Redox substoichiometry in the isotope dilution analysis of antimony was studied. As the substoichiometric reaction the oxidation of trivalent antimony to pentavalent with potassium permanganate was used, followed by the BPHA extraction of trivalent antimony. The redox substoichiometry was applied to the determination of antimony content in 124Sb obtained from JAERI. The content determined was 0.481±0.02 μg, which agreed with the certified value.

Extraction and separation of antimony(III) and (V) by a liquid cation-exchanger HDEHP

A systematic investigation was carried out on the extraction of Sb(III) and (V) with HDEHP from various acidic, neutral and alkaline solutions. Antimony(III) is best extracted from neutral or slightly acidic solutions, and the E values are nearly the same in the forward and backward extractions. Antimony(V) extraction is high only from concentrated HCl and HClO4, and the E values are much larger in the backward direction. Extraction and separation of Sb(III) and (V) was studied as a function of acidity, alkalinity, anion and water-miscible organic additives in the aqueous phase, as well as the diluent used and HDEHP molarity. Separation factors obtained for Sb(III) and (V) were higher than when using isopropyl ether as solvent, which was hitherto used for this purpose.

Solvent extraction of lead, silver, antimony and thallium with zinc dibenzyldithiocarbamate and its application to the separation of bismuth from large amounts of lead

Solvent extraction of lead, silver, antimony and thallium from various acid solutions was investigated with zinc-DBDTC as chelating reagent. These metals were quantitatively extracted over a wide range of acidity with 0.03% zinc-DBDTC solution in carbon tetrachloride. A separation procedure for bismuth from large amounts of lead was developed; bismuth was extracted from 1 M nitric acid with zinc-DBDTC and was separated from lead by subsequently washing the organic phase once with 3.5 M hydrochloric acid or twice with 3 M hydrochloric acid. Satisfactory results were obtained in separating microgram amounts of bismuth from 1 g of lead.

Liquid-Liquid Extraction of Antimony (III) with Mesityl Oxide

Abstract Mesityl oxide [(CH3)2C[dbnd]CHCOCH3] was used for the liquid-liquid extraction of antimony. It can be quantitatively extracted from 3 M hydrochloric acid within 10 sec of equilibration with 15 ml of mesityl oxide. The metal from the organic phase was stripped with 10 ml of water and was determined photometrically as its iodide complex at 425 mm. The probable composition of the extractable species at 3 M hydrochloric acid was either SbCl3 · 3MeO or [HSbCl4 (MeO)3] where MeO is mesityl oxide. The method is simple, rapid, and selective, as it was possible to separate antimony from a large number of elements which are associated with it in alloys and minerals. The method is applicable for the analysis of antimony in solder. The standard deviation is ± 1%.

Extraction and Separation of Antimony III and V from Sulphuric Acid Media by Nonpolar Solvents

Extraction and Separation of Antimony III and V from Sulphuric Acid Media by Nonpolar Solvents

Rapid Extraction of Antimony with Tributyl Phosphate. Direct Photometric Determination with Brilliant Green

Abstract A new method is developed for the rapid extraction and direct photometric determination of antimony. With 20% TBP-toluene 3 to 15 μg of antimony is extracted from 2m hydrochloric acid containing 1 m magnesium chloride. From the organic phase, antimony is directly determined photometrically at 640 nm as its complex with brilliant green. Antimony can be selectively extracted in the presence of a large number of cations and anions. The total operation requires only 20 min.

Atomic absorption spectrophotometry of antimony

The atomic absorption of antimony in combination with extraction of the chloride complex provides a suitable determination of antimony in various materials. The effect of variables on antimony absorption and the extraction of antimony were studied. Procedures for small amounts of antimony in metallurgical products and synthetic fibers are given.

Liquid-liquid extraction of arsenic(III), antimony(III) and bismuth(III) with potassium ethyl xanthate

Methods are described for quantitative extraction of arsenic(III), antimony(III) and bismuth(III) with potassium ethyl xanthate-carbon tetrachloride. The optimum acidity conditions are 0.1–0.2 M hydrochloric acid for arsenic, 1.8–2.5 M hydrochloric acid for antimony and pH 1.5–4.0 for bismuth. From the organic extracts arsenic and antimony are estimated by conventional iodometric methods while bismuth is determined spectrophotometrically at 400 nm. The effect of acidity, reagent concentration, period of extraction and diverse ions are discussed. The infra-red spectra are also described.

Extraction studies of antimony bromide into benzene

Antimony(III) can be extracted rapidly and quantitatively into benzene from a 10 M H 2SO 4–0.03 M HBr system. The extracted antimony bromide has an antimony to bromine ratio of 1:3. Under the above optimum conditions for extraction of antimony, the behaviour of 35 other elements was studied; As 3+, Ge 4+, Se 4+, and Sn 2+ were extracted almost quantitatively, and the percentage extraction of Hg 2+, Bi 3+, and Te 4+ was 74.1%, 10% and 5.5% respectively. The extraction of the elements into benzene from a 5 M H 2SO 4–0.01 M KI system was also investigated, A comparison of the two systems is given.

Some aspects of n-benzoylphenylhydroxylamine and cupferron reactions with tin, antimony and other selected elements

N-Benzoyl-N-phenylhydroxylamine (BPHA) and cupferron are compared in the liquid-liquid extraction of tin and antimony. As in their precipitation reactions tin(II) and tin(IV) behave similarly with BPHA and differently with cupferron. Both reagents behave similarly in extraction of antimony (III), except at high acidity when cupferron or its decomposition products prevent extraction which otherwise occurs into chloroform alone. Separations of Sn, Sb, As and Bi are discussed for extractions from hydrochloric and perchloric acid systems with BPHA. The tin product extracted with BPHA from dilute hydrochloric acid appears to be identical with that precipitated in gravimetric analysis; infrared spectral evidence shows the latter to contain tin(IV). Other precipitation reactions of BPHA in the presence of anions other than chloride and some solubility measurements are also reported.

Aminophosphonic acid mono-esters as reagents for solvent extraction of metals

N-substituted mono-esters of α-aminophosphonic acid have been examined as complexing agents for the extraction of metal from solutions. It was established that N-alkyl substituted derivatives did not form salts or complexes with metals because of a strong betaine like structure. On the contrary, N-aryl substituted derivatives exhibited well pronounced extractive properties. The examination of easy accessible mono-esters of α-anilinobenzylphosphonic acid showed that octyl α-anilinobenzylphosphonate dissolved in ligroin can be successfully used for extraction of manganese, cobalt, nickel, iron, antimony, bismuth and uranium from aqueous sulphuric acid solutions. The conditions are described in which a separation of manganese from cobalt or nickel, as well as a separation of antimony (or bismuth) from arsenic is quantitatively achieved. Some extractable metal complexes with ethyl- or octyl α-anilinobenzylphosphonic acid have been identified spectrophotometrically or isolated and determined by chemical analysis.

Solvent extraction of antimony(v) with ethyl acetate

A method has been derived for the selective extraction of antimony(V) from hydrochloric acid solution with ethyl acetate. The method can be employed for the rapid determination of antimony in antimonates of lead, tin, mercury, nickel and chromium and in type metal. Iron(III), cobalt(II) cadmium(II), and large amounts of copper(II) and tin(II) interfere with the extraction. For the analysis of type metal, tin must be oxidized to the tetravalent state.

The solvent extraction of trace antimony(V)

An investigation of the extraction of trace amounts of antimony(V) from aqueous hydrochloric acid solutions into various others and chloroform has been carried out. Before extractions were made, mutual solubility studies of the two-phased systems were conducted. Then extraction experiments were performed using original aqueous acid concentrations from 0 to 12 N and non-aqueous phases of ethyl ether, isopropye ether, isoamyl ether, n-hexyl ether, and chloroform. Dielectric constant determinations were made in the equilibrated non-aqueous phases, and spectrophotormetric and salting-out studies were carried out on the ethyl ether system. It was found that the isopropyl ether system presents the most advantageous conditions for the extraction of trace antimony(V)

Studies on Methyl Isobutyl Keton Extraction and Determination of Metallic Salts. I-II. I. Extraction of Iron, Antimony, Tin, Arsenic, Selenium, Tellurium and Germanium from the Solutions Containing Hydrochloric Acid and Other Acids.

メチル-イソブチルケトンを種々の金属壌の抽出に用いるために基礎実験を行った。本報は普通のいろいろの元素について主として塩酸溶液からメチル-イソブチルケトンによる抽出を行い, まずおおよその抽出に対する傾向をしらべ, 抽出されやすい金刷中, 鉄, アンチモン, スズ, ヒ素,セレン, テルルおよびゲルマニウムについて実験を行った。これらの塩酸およびその他の酸の溶液の種々の濃度でメチル-イソブチルケトン抽出を行い, 酸溶液中に残ったおのおのの金属についてでれそれ適当な方法で定量を行い, 抽出された金属の量を求め, その抽出率を明らかにした。それぞれの金属について最も適当な条件で行えぱ, 鉄 (III) 99.9%, アンチモン (V) 100%, アンチモン (III) 68%, スズ (IV) 99%, ヒ素 (III) 91%,ヒ素 (V) 28%, セレン (IV) 99%, テルル(IV) 96%, ゲルマニウム (IV) 98%程度抽出される。

Studies on the Determination of Organic Compounds of Metals by the Extraction Method. IX. Extraction and Colorimetric Estimation of Bismuss and Antimony with Antipyrine and Potassium Iodide.

Studies on the Determination of Organic Compounds of Metals by the Extraction Method. IX. Extraction and Colorimetric Estimation of Bismuss and Antimony with Antipyrine and Potassium Iodide.