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Choose the optimal conditions to determine arsenic in mixed media (water _ alcohol) Using a Potentiometric method

اختيار الشروط المثلى لتحديد الزرنيخ في الأوساط المختلطة (ماء _ كحول) بطريقة المعايرة الكمونية

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




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This research aims to study the effect of certain analytical conditions to determine the arsenic in in mixed media (water _ alcohol ) where the user either alcohol ( methanol, ethanol , propanol using a Potentiometric, and then selected as conditions optimal certified for this determine. The effect of each of the (PH value, type, concentration electrolyte, effect of crippling electrolytes) to determine the arsenic in mixed media ( 50:50 water _ alcohol ) and calibration using a standard solution of iodine.In addition to that, there are technical conditions must be tuned to determine the actual value of the end point calibration and data processing of standard solution (initial velocity and deceleration near the end point calibration). The study showed that the PH value appropriate for calibration of arsenic with iodine (pH=8), also found that the response process of arsenic on the electrode platinum has been excellent when using NaHCO3 as electrolyte with concentration of 1 M, which has been successfully used to quantify arsenic As+3, where the value reached detection limit of arsenic to (1×10-5M) in media (50:50water _ methanol ) , but when you use a media ( 50:50 water _ ethanol ) arrived to the limit of detection (1×10-3 M ), As for propanol arrived to the limit of detection (1×10-2 M). Was calculated as the standard deviation and standard deviation percentile confidence limit in addition to the feedback that indicates the efficiency of the method of determining the concentration of arsenic and detection limit for each medium.


Artificial intelligence review:
Research summary
يهدف هذا البحث إلى دراسة تأثير شروط جديدة لتحديد الزرنيخ في الأوساط المختلطة (ماء _ كحول) باستخدام طريقة المعايرة الكمونية الآلية. تم استخدام أنواع مختلفة من الكحول (الميتانول، الإيتانول، البروبانول) وتمت دراسة تأثير قيمة pH، نوع وتركيز الكهرليت، والشوارد المعيقة على تحديد الزرنيخ. أظهرت الدراسة أن قيمة pH المناسبة للمعايرة الكمونية للزرنيخ باليود هي 8، وأن استخدام NaHCO3 ككهرليت بتركيز 1M يعطي استجابة سريعة ودقيقة. تم تحديد حد الكشف للزرنيخ في الأوساط المختلطة، حيث بلغ حد الكشف في وسط (50:50 ماء _ ميتانول) (1×10^-10 M)، وفي وسط (50:50 ماء _ إيتانول) (2×10^-10 M)، وفي وسط (50:50 ماء _ بروبانول) (1×10^-10 M). تم حساب الانحراف المعياري وحد الثقة والإسترجاعية، مما أظهر كفاءة الطريقة من حيث الصحة والدقة في تحديد تركيز الزرنيخ. خلصت الدراسة إلى أن طريقة المعايرة الكمونية فعالة وسهلة الاستخدام واقتصادية لتحديد الزرنيخ في الأوساط المختلطة.
Critical review
دراسة نقدية: على الرغم من أن البحث يقدم طريقة جديدة وفعالة لتحديد الزرنيخ في الأوساط المختلطة، إلا أن هناك بعض النقاط التي تحتاج إلى مزيد من التوضيح. أولاً، لم يتم توضيح السبب وراء اختيار نسبة 50:50 من الماء والكحول بشكل كافٍ، وقد يكون من المفيد دراسة تأثير نسب مختلفة من الماء والكحول على دقة النتائج. ثانياً، لم يتم التطرق إلى تأثير درجات الحرارة المختلفة على نتائج المعايرة، وهو عامل مهم قد يؤثر على دقة القياسات. ثالثاً، قد يكون من المفيد مقارنة نتائج هذه الطريقة مع طرائق أخرى مستخدمة حالياً لتحديد الزرنيخ للتأكد من تفوقها. وأخيراً، يمكن توسيع الدراسة لتشمل أنواع أخرى من الكحول أو مذيبات أخرى قد تكون لها تأثيرات مختلفة على نتائج المعايرة.
Questions related to the research
  1. ما هي قيمة pH المثلى للمعايرة الكمونية للزرنيخ باليود؟

    قيمة pH المثلى هي 8.

  2. ما هو حد الكشف للزرنيخ في وسط (50:50 ماء _ ميتانول)؟

    حد الكشف هو (1×10^-10 M).

  3. ما هو الكهرليت المستخدم في الدراسة وما تركيزه؟

    الكهرليت المستخدم هو NaHCO3 بتركيز 1M.

  4. ما هي الفوائد الرئيسية لطريقة المعايرة الكمونية المستخدمة في البحث؟

    الفوائد الرئيسية تشمل سهولة الاستخدام، السرعة في إجراء التحليل، الحساسية والدقة العالية، وتكاليفها المنخفضة.


References used
JAROON J, PONLAYUTH S, KATE G, SOMACHAI L, PRASAK T, 2009-Cathodic Stripping Voltammetric Procedure for Determination of Some Inorganic Arsenic Species in Water, Soil and Ores Samples. Chiang Mai J. Sci, Vol.36.369-383
ARISTIDIS N, ANTHEMIDIS G, ZACHARIADIS J, 2005- Determination of arsenic(III) and total inorganic arsenic in water samples using an on-line sequential insertion system and hydride generation atomic absorption spectrometry. Analytica Chimica Acta,Vol.547 .237–242
PEREIRA S, FERREIRA L, OLIVEIRA G, PALHETA D, BARROS B, 2008-Spectrophotometric determination of arsenic in soil samples using 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (Br- PADAP). Ecl. Quím., São Paulo, Vol.33. 23-28
NURULHAIDAH D, NOR Y. TAN T, ABDUL A, 2012- Electrochemical Sensor for As(III) Utilizing CNTs/ Leucine/Nafion Modified Electrode. Int. J. Electrochem. Sci, Vol.7 . 175 –185
NIEDZIELSKI P, SIEPAK M, SIEPAK J, PRZYBYLEK J, 2002- Determination of Different Forms of Arsenic, Antimony and Selenium in Water Samples Using Hydride Generation. Polish Journal of Environmental Studies Vol. 11. 219-224
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