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Study 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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 Publication date 2020
  fields Chemistry
and research's language is العربية
 Created by Shamra Editor




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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.


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Research summary
تتناول هذه الدراسة الشروط المثلى لتشكيل معقد السيلينيوم مع كاشف (NEDA) (1- نفتيل ايتلين دي أمين دي هيدروكلوريد) واستخدامها لمراقبة المحافظ الدقيقة للسيلينيوم. السيلينيوم هو عنصر غذائي أساسي يمكن أن يكون سامًا عند تناوله بجرعات مرتفعة. تم استخدام طريقة التحليل الطيفي الضوئي اللوني في المجال المرئي عند طول الموجة 540 نانومتر لتحديد المعقد بين أيون السيلينيوم والكاشف NEDA تحت شروط مثلى وهي درجة حرارة 50 درجة مئوية، زمن 240 دقيقة، حجم الكاشف المضاف 4 مل، وتركيز الكاشف 1%. أظهرت الطريقة دقة وصحة جيدة، حيث تحقق صحة الطريقة من خلال المردود النسبي المئوي (99.68%)، ودقة الطريقة من خلال القيمة المنخفضة للانحراف المعياري (1.172≤SD) وبالتالي الانحراف المعياري النسبي المئوي (1.725≤RSD). تم تحضير المحافظ الدقيقة للسيلينيوم بنسبة تمحفظ بلغت 36% عند تركيز 3% للألجينات و1% من كلوريد الكالسيوم، وارتفعت إلى 51.2% عند زيادة تركيز الكالسيوم إلى 2%.
Critical review
دراسة نقدية: تعتبر هذه الدراسة مهمة في مجال الكيمياء التحليلية، حيث تقدم طريقة جديدة وسريعة لتحديد تركيز السيلينيوم باستخدام كاشف NEDA. ومع ذلك، يمكن توجيه بعض النقد البناء لتحسين البحث. أولاً، لم يتم التطرق بشكل كافٍ إلى تأثير العوامل البيئية المختلفة على دقة وصحة النتائج، مثل تأثير التلوث أو وجود عناصر أخرى قد تتداخل مع القياسات. ثانياً، كان من الممكن توسيع نطاق الدراسة لتشمل تطبيقات أخرى للسيلينيوم في مجالات مختلفة مثل الطب والصناعة. ثالثاً، لم يتم تقديم تفاصيل كافية حول كيفية تحسين نسبة التمحفظ بشكل أكبر، وهو ما قد يكون مفيداً في التطبيقات العملية. على الرغم من هذه النقاط، فإن الدراسة تقدم إسهاماً قيماً في مجال تحليل السيلينيوم.
Questions related to the research
  1. ما هي الشروط المثلى لتشكيل معقد السيلينيوم مع كاشف NEDA؟

    الشروط المثلى هي درجة حرارة 50 درجة مئوية، زمن 240 دقيقة، حجم الكاشف المضاف 4 مل، وتركيز الكاشف 1%.

  2. ما هي نسبة التمحفظ القصوى التي تم تحقيقها في الدراسة؟

    تم تحقيق نسبة تمحفظ قصوى بلغت 51.2% عند تركيز 3% للألجينات و2% من كلوريد الكالسيوم.

  3. ما هي الطريقة المستخدمة لتحديد معقد السيلينيوم مع كاشف NEDA؟

    تم استخدام طريقة التحليل الطيفي الضوئي اللوني في المجال المرئي عند طول الموجة 540 نانومتر.

  4. ما هي دقة وصحة الطريقة المستخدمة في الدراسة؟

    أظهرت الطريقة دقة وصحة جيدة، حيث تحقق صحة الطريقة من خلال المردود النسبي المئوي (99.68%)، ودقة الطريقة من خلال القيمة المنخفضة للانحراف المعياري (1.172≤SD) وبالتالي الانحراف المعياري النسبي المئوي (1.725≤RSD).


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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