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Register a new userA new spectrophotometric analytical reagent for determination of Fe(III)
كاشف تحليلي جديد لتعيين الحديد الثلاثي طيفياً
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Added by
Damascus University ورقة بحثية
Publication date
2006
fields
Chemistry
and research's language is
العربية
Authors
جمال يونس حمدو( باحث )
Created by
Shamra Editor
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يعرض هذا البحث تحضير كاشف لتعيين الحديد بالقياس الطيفي و اقتراح طريقـة طيفيـة بـسيطة و سريعة لتعيين الحديد في عينـات مختلفـة. عينـت هويـة المركـب المحـضر 2(-1-أسـيتيل-2- أوكسوبروبيل) أكريلو نيتريل AOA بالتحليل العنصري و طيف الأشعة تحت الحمراء. درسـت الـشروط المثلى لتفاعل الحديد (III) مع AOA حيث يتشكل معقد ملون و هو الأساس الذي اعتمد في اسـتخدامه كاشفاً تحليلياً لتعيين (III(Fe بالقياس الطيفي. وجد أن امتصاصية المعقد يخضع لقانون بيير – لامبـرت في مجال واسع من تركيز أيون الحديد. طبقت الطريقة المقترحة على تعيين الحديد في بعـض الـسبائك النحاسية و الأقراص الصيدلانية. و وجد أن الانحراف المعياري النسبي لا يتجاوز 3%.
This paper outline a new, simple, selective and sensitive spectrophotometric procedure for the quantitative determination of iron. The bidentate ligand of 2- (1-Acetyl-2-oxopropyl)acrylonitrile has been synthesized ,and determined by elemental analysis and infrared spectroscopy. The compound reacts with Fe(III) to form a colored complex with an absorption maxima at 400nm and 490nm. The effect of pH, amount of reagent, time, temperature and the interference of many ions on the Fe (III) determination was also estimated. Beer's law is obeyed for iron concentration in the range (0.23- 4.48μg/ ml) for spectrophotometric method and (0.56-8.4) for extraction spectrophotometric method. The molar absorptivity was in the rang 2.70x104-3.46 x 104 L.mol-1cm-1. Sandall's sensitivity was found to be 1.61 x 10 -3 – 2.07 x 10-3 μg . cm-2. The RSDs for both spectrophotometric and extraction spectrophotometric methods were below 3%. The analytical error SD/√n was within 0.021. The technique has been applied to the determination of iron in alloys and in pharmaceutical preparations.
References used
Kiran, T. N. and Revanasiddappa, H. D. (2003). Rapid and Sensitive Spectrophotometric Determination of Trace Amounts of Iron (III) Using Leuco Xylene Cyanol FF. Analytical and Bioanalytical Chemistry. 376, 1126 – 1130
Chacaroli,C.J.,Rade,J.F., Guimaraes, O. M., Balbo, V. R., Venezuela, C. S. and Teruel, F. S. (2000). Spectrophotometric Study of Iron Oxidation in the Iron(II) /Azide/ Tetrahydrofuran System and Some Analytical Applications. Anal Chem. Acta.411, 217-222
Ohno, S., Teshima, N., Zhang, H., and SAKA T. (2003). Utilization of Activating and Masking Effects by Ligands for Highly Selective Catalytic Spectrophotometric Determination of Copper and Iron in Natural Waters. Talanta. 60, 1177-1185
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