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Register a new userStudy of the Optimal Parameters for the Formation of Selenium Complex with the (NEDA) N- (1-naphthyl-ethylenediamine dihydrochloride) C_12 H_14 N_(2. 2) 〖HCl〗_ Reagent and its use for the Control of Selenium Microcapsules
دراسة الشروط المثلى لتشكيل معقد السيلينيوم مع كاشف (NEDA) N- (1- نفتيل ايتلين دي أمين دي هيدروكلوريد) C_12 H_14 N_(2 .2) 〖HCl〗_ واستخدامها لمراقبة المحافظ الدقيقة للسيلينيوم
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Tishreen University ورقة بحثية
Publication date
2020
fields
Chemistry
and research's language is
العربية
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Shamra Editor
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يعد السيلينيوم من العناصر الغذائية الأساسية والمعادن الزهيدة وتعرف في الأدب الطبي أمراض نقص السيلينيوم. بينت الدراسات أن تناول السيلينيوم بجرعات مرتفعة سام عند البشر. يتوزع السيلينيوم على نطاق واسع في الطبيعة ونظراً لأهمية مركباته في التطبيقات الصناعية, فقد حددت تراكيزه بالعديد من التقنيات التحليلية. تم في هذه الدراسة دراسة الشروط المثلى لتشكيل معقد السيلينيوم مع كاشف NEDA)) N- (1- نفتيل ايتلين دي أمين دي هيدروكلوريد) واستخدامها لمراقبة المحافظ الدقيقة للسيلينيوم, وهي طريقة تتميز بأنها سريعة وحساسة وانتقائية. استخدمت طريقة التحليل الطيفي الضوئي اللوني في المجال المرئي عند طول الموجة nm 540 لمقايسة المعقد بين أيون السيلينيوم والكاشف NEDA وفق شروط مثلى لتشكل المعقد وهي درجة الحرارة 50, الزَمن min t=240, حجم الكاشف المضاف V=4 ml, تركيز الكاشف المضاف 1%. أبدت هذه الطريقة دقة وصحة جيدتين, حيث تحققت صحة الطريقة من خلال المردود النسبي المئوي (R=99.68%), أما دقة الطريقة من خلال القيمة المنخفضة للانحراف المعياري (1.172(SD وبالتالي الانحراف المعياري النسبي المئوي (1.725(RSD . حضرت المحافظ الدقيقة للسيلينيوم حيث كانت بلغت نسبة التمحفظ 36% عند تركيز 3% للألجينات و1% من كلوريد الكالسيوم وارتفعت إلى 51.2% عند زيادة تركيز الكالسيوم إلى 2%.
Selenium is an essential nutritional mineral, and selenium deficiency diseases are known in medical literature. Studies have shown that selenium intake in high doses is toxic in humans. Selenium is widely distributed in nature and due to the importance of selenium and its compounds in industrial applications; several analytical techniques have been reported to estimate selenium. In this study the optimal conditions for the formation of selenium complex with NEDA reagent will be studied and used for the control of selenium microcapsules, a method that is characterized by being rapid, sensitive and selective. The optical spectrophotometric method was used in the visible field at 540 nm wavelength to determine the complex between the selenium ion and the NEDA reagent under optimal conditions for complex formation namely temperature 50℃, time min t = 240, added reagent volume V=4ml, and reagent concentration 1%. This method showed good accuracy and correctness, as the method's validity was achieved through the relative percentage yield (R = 99.68%), while the accuracy of the method was achieved through the low value of the standard deviation (SD≤) (1.172) and thus the percentage relative standard deviation (RSD≤) (1.725). Selenium microcapsules were prepared, with an entrapment efficiency of 36% at a concentration of 3% for alginate and 1% while the entrapment efficiency rose to 51.2% at a concentration of 2% for calcium chloride.
References used
Reilly, C. Selenium in Food and Health; Springer Science Media: New York, NY, USA, 2006
Patai, S.; Rappoport, Z. The Chimestry of Organis Selenium and Tellurium Compounds; Willey: New York, NY, USA, 1986; Volume 1
Tinggi, U. Essentiality and toxicity of selenium and its status in australia: A review. Toxicol. Lett.2003, 137, 103–110.
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