Spectrophotometric Determination Of Zinc Research Articles

Spectrophotometric determination of zinc by solvent extraction with 1, 10-phenanthroline and Bromocresol Green

水溶液中に,1,10-フェナントロリン-亜鉛キレートとブロムクレゾールグリーンが共存するとき,1,2-ジクロルエタンと振り混ぜると無色のキレート陽イオンとブロムクレゾールグリーンの陰イオンがイオン対となって有機層へ抽出される.このような現象に基づく微量亜鉛の吸光光度定量法を検討した.その結果,pH7において抽出し,試薬ブランクを対照として416mμで吸光度を測定すれば.水溶液中の亜鉛濃度が1×10-5Mまではベール則に従い,感度よく亜鉛を定量できることがわかった.抽出種の組成についても検討し,フェナントロリン-亜鉛キレートとブロムクレゾールグリーンが1:2のモル比で抽出されていることを明らかにした.なお,重金属イオンの共存は定量を妨害する.

Spectrophotometric Determination of Zinc with 4-(2-Pyridylazo) resorcinol

4-(2-ピリジルアゾ)レゾルシソ(PAR)は亜鉛と鋭敏に反応して,水溶性の櫃赤色錯体を生成する。この錯体はpH9.2-10.6で一定の吸光度をもち,波長493mμ において最大吸収を示す。感度はきわめて高く,モル吸光係数は8.3×104であり,亜鉛量0.8μg/mlまでBeerの法則にしたがう。また錯体の組成は,亜鉛:PAR=1:2である。38種の共存イオンについて検討した結果,イソジウム,ビスマス,銅,水銀(II),カドミウム,イヅトリウム,マソガン,コパルト,ニッケルが妨害するが,インジウムとマンガンはピロリン酸ナトリウムを添加することにより,また,ビスマスおよびイットリウムはそれぞれ酒石酸ナトリウムおよびフッ化ナトリウムを添加することによりマスクできる。なお,イオン交換分離法の併用により,多量の銅,マソガン,コパルト,ニッケルと共存する微量の亜鉛を定量することができた。

Derivatives of 2-(2-thiazolylazo)phenol as analytical reagents—VII : Spectrophotometric determination of zinc with 1-(2-thiazolylazo)-2-naphthol

The spectrophotometric determination of trace amounts of zinc using derivatives of 2-(2-thiazolylazo)phenol has been studied. With zinc these compounds form blue or red-violet chelates, which are mostly extractable with chloroform to give solutions exhibiting an absorption maximum near 600 mμ. 1-(2-Thiazolylazo)-2-naphthol (NT) is recommended for the determination of zinc down to 0.1 μg Sandell's expression of the sensitivity is 0.0013 μg of zinc/cm 2. The interference of 29 cations and 11 anions has been examined in the presence and absence of ammonium citrate and demethylglyoxime. Mereury(II), manganese(II), cadmium(II), uranium(VI), EDTA, cyanide and pyrophosphate interfere, but mercury(II) and manganese(II) can be masked by the addition of thiosulphate and periodate, respectively. NT has been applied to the determination of zinc in thorium oxide and magnesium.

Polarographic and Spectrophotometric Determination of Zinc in Zinc Stearate

Polarographic and Spectrophotometric Determination of Zinc in Zinc Stearate

ジンコンによる鋳鉄中亜鉛の光度定量法

ジンコンによる鋳鉄中亜鉛の光度定量法

Spectrophotometric Determination of Zinc and Other Metals with Alpha, Beta, Gamma, Delta-Tetraphenytporphine

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpectrophotometric Determination of Zinc and Other Metals with Alpha, Beta, Gamma, Delta-TetraphenytporphineC. V. Banks and R. E. BisqueCite this: Anal. Chem. 1957, 29, 4, 522–526Publication Date (Print):March 27, 1957Publication History Published online1 May 2002Published inissue 27 March 1957https://doi.org/10.1021/ac50162a028RIGHTS & PERMISSIONSArticle Views91Altmetric-Citations28LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (622 KB) Get e-Alerts Get e-Alerts