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Evaluation of the Potentiometric Titration Used to determinate arsenic)III( in mixed and aqueous media comparing with Atomic Absorption Method

تقييم طريقة المعايرة الكمونية لتعيين تركيز الزرنيخ (III) في الأوساط المائية والمختلطة بالمقارنة مع طريقة مطيافية الامتصاص الذري

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 Publication date 2014
and research's language is العربية
 Created by Shamra Editor




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This study aims to compare the results of two methods ,used to determinate arsenic in mixed and aqueous media: proposed potintiometrc titration and referenced atomic absorption and then applied the proposed method to some environmental samples. In this paper, Arsenic)III( has been titrated with iodine in aqueous and mixed media using the direct method and platinum electrode after choosing optimal technical and analytical conditions. The atomic absorption, which is often used to determine the arsenic in many applications, has been chosen as comparison guide, where the reaction take place between sodium borate (NaBH4) and arsenic Acid H3AsO3 to produce the effective compound AsH3 used to determine arsenic by this instrument . Different statistical treatments were used to evaluate the result of the determination of arsenic in desired media. The result of this investigation suggest that , it’s highly recommend to use the proposed method for its high efficiency, ease, simplicity and low cost comparing with atomic absorption technique that requires expensive equipment


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Research summary
تهدف هذه الدراسة إلى مقارنة طريقتين لتحديد تركيز الزرنيخ (III) في الأوساط المائية والمختلطة: طريقة المعايرة الكمونية وطريقة مطيافية الامتصاص الذري. تم استخدام مسرى البلاتين لمعايرة الزرنيخ مع اليود في الأوساط المائية والمختلطة بعد تحديد الشروط التحليلية والتقنية المثلى. كما استخدمت تقنية مولد الهيدرات في مطيافية الامتصاص الذري، حيث يتفاعل بورات الصوديوم مع حمض الزرنيخ لإنتاج مركب AsH3 الفعال. أظهرت النتائج أن طريقة المعايرة الكمونية تتميز بكفاءة عالية وسهولة في الاستخدام وتكلفة منخفضة مقارنة بمطيافية الامتصاص الذري التي تتطلب تجهيزات غالية. تم تطبيق الطريقة المقترحة على عينات بيئية مختلفة وأظهرت نتائج موثوقة ودقيقة. توصي الدراسة باستخدام طريقة المعايرة الكمونية كبديل فعال لمطيافية الامتصاص الذري في تحديد تركيز الزرنيخ في الأوساط المختلفة.
Critical review
تعتبر هذه الدراسة مفيدة ومهمة في مجال تحليل الزرنيخ، حيث تقدم طريقة بديلة وفعالة من حيث التكلفة والسهولة مقارنة بمطيافية الامتصاص الذري. ومع ذلك، يمكن تقديم بعض الملاحظات النقدية لتحسين البحث. أولاً، قد يكون من المفيد توسيع نطاق الدراسة لتشمل أنواع أخرى من الأوساط البيئية والمختلطة. ثانياً، يمكن تعزيز الدراسة بإجراء تجارب إضافية للتحقق من موثوقية الطريقة المقترحة في ظروف مختلفة. أخيراً، قد يكون من المفيد إجراء مقارنة مع طرق تحليلية أخرى مثل التحليل بالتنشيط النيوتروني أو تقنيات البلازما المقرونة حثياً لتقديم صورة شاملة عن فعالية الطريقة المقترحة.
Questions related to the research
  1. ما هي الطريقتان المستخدمتان في هذه الدراسة لتحديد تركيز الزرنيخ (III)؟

    الطريقتان المستخدمتان هما المعايرة الكمونية ومطيافية الامتصاص الذري.

  2. ما هي المزايا التي تتمتع بها طريقة المعايرة الكمونية مقارنة بمطيافية الامتصاص الذري؟

    طريقة المعايرة الكمونية تتميز بكفاءة عالية وسهولة في الاستخدام وتكلفة منخفضة مقارنة بمطيافية الامتصاص الذري التي تتطلب تجهيزات غالية.

  3. ما هي الأوساط التي تم تطبيق الطريقة المقترحة عليها في الدراسة؟

    تم تطبيق الطريقة المقترحة على عينات بيئية مختلفة مثل مياه الصرف الصحي والتربة والنباتات.

  4. ما هي التوصية الرئيسية التي توصلت إليها الدراسة؟

    توصي الدراسة باستخدام طريقة المعايرة الكمونية كبديل فعال لمطيافية الامتصاص الذري في تحديد تركيز الزرنيخ في الأوساط المختلفة.


References used
Luong,H .; Majid, E .; Male, K.Analytical Tools for Monitoring Arsenic in the Environment.Open Analytical Chemistry Journal, 1, 2009, 7-14
Nurulhaidah, D.; Nor , Y.; Tan ,T.; Abdul , A.Electrochemical Sensor for As(III) Utilizing CNTs/ Leucine/Nafion Modified Electrode.Int. J. Electrochem. Sci., 7 ,2012, 175 –185
Kazimierz ,W.; Katarzyna, W.; Bryan, P.; Sasi,S.; Joseph, A .Determination of As(III), As(V), monomethylarsonic acid,dimethylarsinic acid and arsenobetaine by HPLC_ICP_MS: analysis of reference materials, fish tissues and urine. Talanta 58 (2002) 899_907
Niedzielski, P.; Siepak, M.; Siepak, J.; Przybyłek, J.; Determination of Different Forms of Arsenic, Antimony and Selenium in Water Samples Using Hydride Generation. Polish Journal of Environmental Studies Vol. 11, No. 3 (2002), 219-224
Pereira1, S.; Ferreira, L.; Oliveira, G.; Palheta, D.; Barros, B. Spectrophotometric determination of arsenic in soil samples using 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (Br- PADAP). Ecl. Quím., São Paulo, 33(3): 23-28, 2008
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