Photometric Determination of Beryllium

Hill, U. T.

doi:10.1021/ac60136a021

Cited by 32 publications

(3 citation statements)

References 14 publications

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“…The method of Hill (1959)was used. The reagent is Eriochrome Cyanine R at pH 9·6 and in the presence of versenate and cyanide to achieve specificity.…”

Section: Berylliummentioning

confidence: 99%

The Use of a Cation Exchange Resin in the Detection and Determination of Some Inorganic Cations in Biological Materials

Tompsett

1964

Proceedings of the Association of Clinical Biochemists

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“…The method of Hill (1959)was used. The reagent is Eriochrome Cyanine R at pH 9·6 and in the presence of versenate and cyanide to achieve specificity.…”

Section: Berylliummentioning

confidence: 99%

The Use of a Cation Exchange Resin in the Detection and Determination of Some Inorganic Cations in Biological Materials

Tompsett

1964

Proceedings of the Association of Clinical Biochemists

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“…The reaction of Eriochrome Cyanine R in the presence of sodium Versenate at pH 9.7 to 9.8 was used in the analysis , of steel for beryllium. The intensity of the color w-as measured at 512 µ (83).…”

Section: Berylliummentioning

confidence: 99%

Ferrous Metallurgy

Beeghly¹

1959

Anal. Chem.

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“…The solution was made up to 50 ml. Finally the absorbance of the red colored complex was measured at 510 nm vs. a reagent blank prepared similarly (11,12).…”

mentioning

confidence: 99%

Diluted tributyl phosphate as an extractant for beryllium as its thiocyanate complex

Kalyanaraman¹,

Khopkar²

1975

Anal. Chem.

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50% Tributyl phosphate-toluene was used for the quantitative extraction of beryllium from 0.5M hydrochloric acid containing 5M ammonium thiocyanate. Beryllium was stripped from the organic phase with 1M sodium hydroxide and determined colorimetrically at 510 nm as its complex with Eriochrome Cyanine R.Although several extractants are available for the solvent extraction of beryllium, they have only limited applications (1) . The d-diketones had no special advantages (2). Diethyl ether was used in fluoride (3) and thiocyanate (4) media but the extraction was incomplete. Trioctylamine in methyl isobutyl ketone (5) was used for its separation from acidic solutions.Tributyl phosphate (6) was used for the extraction of beryllium but the method had no practical utility as the extraction was possible only from 0.1M hydrochloric acid and 14M lithium chloride. Further, the extraction was not quantitative. A similar attempt was made to use tributyl phosphate as an extractant (7) in the presence of salicylic acid with no advantage.Many transition elements were extracted as their thiocyanate complexes with tributyl phosphate as the extractant(2) . Sekine (8) extracted americium from 5M sodium thiocyanate with 5% tributyl phosphate in hexane. Similarly, De and Sen (9) utilized the thiocyanate system for the solvent extraction of some transition elements such as cobalt, copper, and iron with tributyl phosphate.An attempt was made to extract beryllium from thiocyanate media with 50% tributyl phosphate, using toluene as the diluent. This paper describes such a method for the solvent extraction of beryllium. The method proposed is simple, rapid, selective, and applicable at microgram concentrations. The procedure was extended for the analysis of beryllium in beryl. EXPERIMENTALApparatus and Reagents. A Spektromom 204 spectrophotometer with 10-mm matched quartz cells, a Type FEK-57 photoelectric filter photometer, and Cambridge pH meter with glass and calomel electrodes were used.The tributyl phosphate, bp 143 °C, was from British Drug House, England (BDH). About 1.241 grams of beryllium nitrate tetrahydrate (BDH Ana-laR) was dissolved in 100 ml of distilled water containing 1 ml of nitric acid. The solution was standardized gravimetrically (10). It contained 0.545 mg/ml of beryllium. The diluted solution containing 5.45 Mg/ml of beryllium was prepared from stock solution by appropriate dilution.Eriochrome Cyanine R. (E. Merck, Germany) was an 0.1% a ueous solution.General Procedure. An aliquot of the solution containing 10.9 Mg of beryllium was taken. Then enough hydrochloric acid and ammonium thiocyanate were added to make their concentrations 0.5M and 5M, respectively, in a total volume of 25 ml. The sample was then transferred to a separatory funnel and extracted with 10 ml of 50% tributyl phosphate in toluene for 5 minutes at room temperature. The two layers were allowed to settle and separate.Beryllium was stripped from the organic phase by shaking it twice with 15 ml of 1M sodium hydroxide. To the aqueous phase, 3 ml of con...

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Photometric Determination of Beryllium

Cited by 32 publications

References 14 publications

The Use of a Cation Exchange Resin in the Detection and Determination of Some Inorganic Cations in Biological Materials

The Use of a Cation Exchange Resin in the Detection and Determination of Some Inorganic Cations in Biological Materials

Ferrous Metallurgy

Diluted tributyl phosphate as an extractant for beryllium as its thiocyanate complex

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