عنوان المقالة:التقدير الطيفي لل (Co(II باستخدام الاثيل سيانوليت( 2 ميثل كاربوكس فنايل ازو استيت) (ECA ) (Spectrophotometric Determination of Co(II) by Using Ethyl Cyano(2-Methyl Carboxylate Phenyl Azo Acetate) (ECA
مها عبدالستارمحمد نجيب | Maha abd alsattar mohammed najeeb | 3109
- نوع النشر
- مجلة علمية
- المؤلفون بالعربي
- الهام انغيمش مزعل , كوثر احمد صادق, مها عبد الستار محمد, رسمية محمد رميز
- المؤلفون بالإنجليزي
- Elham Nghaimesh Mezaal, Kawther Ahmad Sadiq, Maha Abd Al-Sattar Mohammed, Rasmia Mahmood Rumez
- الملخص الانجليزي
- A new simple and sensitive spectrophotometric method for the determination of trace amount of Co(II) in the ethanol absolute solution have been developed. The method is based on the reaction of Co(II) with ethyl cyano(2-methyl carboxylate phenyl azo acetate) (ECA) in acid medium of hydrochloric acid (0.1 M) givining maximum absorbance at ((λmax = 656 nm). Beer's law is obeyed over the concentration range (5-60) (μg / ml) with molar absorptivity of (1.5263 × 103 L mol-1 cm-1) and correlation coefficient (0.9995). The precision (RSD% ˂ 1%). The stoichiometry of complex was confirmed by Job's method which indicated the ratio of metal to reagent is (2:1). The studied effect of interference elements Zn(II), Cu(II), Na(I), K(I), Ca(II) and Mg(II) on the complexation of Co(II) and have been studied and applied to determine Co(II) in synthetic water samples.
- تاريخ النشر
- 07/02/2016
- الناشر
- International Journal of Applied Chemistry.
- رقم المجلد
- 12
- رقم العدد
- 4
- الصفحات
- 699-711
- رابط الملف
- تحميل (68 مرات التحميل)
- الكلمات المفتاحية
- Spectrophotometric, determination, cobalt, complex