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- W1485678045 abstract "Ozet. Bu calismada bakir tayini icin bir UV-VIS spektrofotometrik yontem onerilmektedir. Yontem, sodyumdodesilsulfat (SDS) miseli ortaminda 8-hidroksikinolin (oksin) ile komplekslesmeyi icine almakta ve bunu dogrudan 399 nm dalga boyunda absorbans olcumu takip etmektedir. Calismada pH, ligant ve surfaktan derisimleri, absorbansi etkileyen kritik etkenler olup bunlarin optimizasyonu yapilmistir. Yontemin pH 5,3 ve 399 nm dalga boyunda molar absorplama katsayisi 3,410 3 Lmol -1 cm -1 , Sandell duyarligi 1,810 -3 µg/mL, g/cm 2 , gozlenebilme siniri 0,2 µg/mL, niceleme siniri 0,8 mg/mL, calisma araligi 0,8- 6 µg/mL’dir. Yontem, pirinc alasimi ornegine bakir tayini icin uygulandiginda % 2,9 ve daha iyi bagil standart sapma degerleri elde edilmistir. Yontemin dogrulugu biri standart ekleme, digeri AAS ile karsilastirma yontemiyle belirlenmis, sirasiyla % 99 ve % 94 geri kazanim elde edilmistir. Anahtar Kelimeler: Bakir tayini, UV-VIS spektrofotometrik analiz, 8- Hidroksikinolin (oksin), sodyumdodesilsulfat (SDS), misel ortam. Abstract. It has been proposed an UV-VIS spectrophotometric method for copper determination. The methods is based upon formation the copper – 8-hydroxyquinoline complex in a sodium dodecil sulphate (SDS) micellar medium and measurment of absorbance of the complex at 399 nm. The critical parameters of absorbans of the complex hence the method were optimized such as surfactant concentration, ligant concentration and pH. The molar absorptivity of the complex was 3,410 3 Lmol -1 cm -1 at the optimum pH 5,30. The Sandell’s sensivity, limit of dedection, limit of quantitation and dynamic range were 1,8.10 -2 µg /cm 2 , 0,2 µg/mL, 0,8 µg/mL, 0,8-6,6 µg/mL respectively. The methods was applied for determination of copper in brass alloy with about 2,3 % RSD and about 4 % relative error. Keywords : Copper analys, UV-VIS spectrophotometric method, 8-hydoxyquinoline (oxin), sodyumdodecilsulphate(SDS), micellar medium" @default.
- W1485678045 created "2016-06-24" @default.
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- W1485678045 date "2012-03-17" @default.
- W1485678045 modified "2023-09-23" @default.
- W1485678045 title "Sodyumdodesilsülfat Miseli Ortamında 8-hidroksikinolin ile Kompleksleştirme Yoluyla Bakırın UV-VIS Spektrofotometrik Tayini" @default.
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