A New Spectrophotometric Method for Determination of Selenium in Cosmetic and Pharmaceutical Preparations after Preconcentration with Cloud Point Extraction
المؤلفون المشاركون
Soruraddin, Mohammad Hosein
Heydari, Rouhollah
Zahedi, Mir Mehdi
Puladvand, Morteza
المصدر
International Journal of Analytical Chemistry
العدد
المجلد 2011، العدد 2011 (31 ديسمبر/كانون الأول 2011)، ص ص. 1-8، 8ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2011-04-05
دولة النشر
مصر
عدد الصفحات
8
التخصصات الرئيسية
الملخص EN
A simple, rapid, and sensitive spectrophotometric method for the determination of trace amounts of selenium (IV) was described.
In this method, all selenium spices reduced to selenium (IV) using 6 M HCl.
Cloud point extraction was applied as a preconcentration method for spectrophotometric determination of selenium (IV) in aqueous solution.
The proposed method is based on the complexation of Selenium (IV) with dithizone at pH < 1 in micellar medium (Triton X-100).
After complexation with dithizone, the analyte was quantitatively extracted to the surfactant-rich phase by centrifugation and diluted to 5 mL with methanol.
Since the absorption maxima of the complex (424 nm) and dithizone (434 nm) overlap, hence, the corrected absorbance, Acorr, was used to overcome the problem.
With regard to the preconcentration, the tested parameters were the pH of the extraction, the concentration of the surfactant, the concentration of dithizone, and equilibration temperature and time.
The detection limit is 4.4 ng mL-1; the relative standard deviation for six replicate measurements is 2.18% for 50 ng mL-1 of selenium.
The procedure was applied successfully to the determination of selenium in two kinds of pharmaceutical samples.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Soruraddin, Mohammad Hosein& Heydari, Rouhollah& Puladvand, Morteza& Zahedi, Mir Mehdi. 2011. A New Spectrophotometric Method for Determination of Selenium in Cosmetic and Pharmaceutical Preparations after Preconcentration with Cloud Point Extraction. International Journal of Analytical Chemistry،Vol. 2011, no. 2011, pp.1-8.
https://search.emarefa.net/detail/BIM-494045
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Soruraddin, Mohammad Hosein…[et al.]. A New Spectrophotometric Method for Determination of Selenium in Cosmetic and Pharmaceutical Preparations after Preconcentration with Cloud Point Extraction. International Journal of Analytical Chemistry No. 2011 (2011), pp.1-8.
https://search.emarefa.net/detail/BIM-494045
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Soruraddin, Mohammad Hosein& Heydari, Rouhollah& Puladvand, Morteza& Zahedi, Mir Mehdi. A New Spectrophotometric Method for Determination of Selenium in Cosmetic and Pharmaceutical Preparations after Preconcentration with Cloud Point Extraction. International Journal of Analytical Chemistry. 2011. Vol. 2011, no. 2011, pp.1-8.
https://search.emarefa.net/detail/BIM-494045
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-494045
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر