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Register a new userThe effect of the proportion of the media (water _ alcohol ) to determine arsenic Using a Potentiometric method
تأثير نسبة الوسط (ماء - كحول) في تحديد الزرنيخ بطريقة المعايرة الكمونية الآلية
2026
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تناول هذا البحث دراسة تأثير نسبة المزج (ماء - كحول) في تحديد الزرنيخ بطريقة المعايرة الكمونية الآلية , باستخدام كحول (ميتانول _ إيتانول _ بروبانول)، أجريت عملية المعايرة لحجم محدّد من المحلول المدروس بحجم محدد من محلول قياسي من اليود باستخدام جهاز المعايرة الكمونية الآلية , وذلك بعد تطبيق الشروط (التحليلية والتقنية)المثلى لتحديد الزرنيخ ، ومن ثمّ قمنا بدراسة تأثير نسب المزج في حدّ الكشف عن الزرنيخ في الأوساط المختلطة (ماء_ كحول) . أظهرت الدراسة أن قيمة حد الكشف للزرنيخ تتغير بتغير نوع الكحول المستخدم و نسبته في وسط التفاعل، إذ وصلت إلى (M 10-7× (1وذلك في وسط (75:25 ماء_ ميتانول) ، وعند استخدام وسط (75:25 ماء_ ايتانول) وصل حدّ الكشف إلى (M 10-4× (1، وبالنسبة للبروبانول وصل حد الكشف إلى (M 10-3× (1. كما وصلت قيمة حدّ الكشف للزرنيخ إلى (M 10-5× (1, وذلك في وسط (50:50 ماء_ ميتانول) ، أمّا عند استخدام وسط (50:50 ماء_ ايتانول) وصل حد الكشف إلى (M 10-3× (1، أما بالنسبة للبروبانول وصل حدّ الكشف إلى (M 10-2× (1. بينت الدراسة أنّ استخدام النسبة (75:25 ماء_ كحول) أعطت قيمة أقل لحد الكشف , وبالتالي نتائج أفضل. كما تم حساب الانحراف المعياري و الانحراف المعياري المئوي وحدّ الثقة , بالإضافة إلى الإسترجاعية التي دلّت على كفاءة الطريقة في تحديد تركيز الزرنيخ وحدّ الكشف لكل وسط
This research study the effect of the proportion of the media (water - alcohol ) to determine where the arsenic used alcohol ( methanol _ ethanol _ propanol ) Using a Potentiometric method. It conducted the calibration process for the specific size of the solution studied a specific size of the standard solution of iodine Using a Potentiometric method , after the application of analytical conditions and technical optimal to determine arsenic , and then we studied the effect of mixing ratio on the detection limit for arsenic in mixed media (water _ Alcohol ) . The study showed that the value of the detection limit of arsenic vary with the type of alcohol used and accounted for in the reaction medium , it reached to (1× 10-7 M) in media (75:25 water _ methanol ) , but when you use a media ( 75:25 water _ ethanol ) arrived to the limit of detection (1×10-4 M ), As for propanol arrived to the limit of detection (1×10-3 M). where the value reached detection limit of arsenic to (1× 10-5 M) in media ( 50:50 water _ 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). The study showed that the use of the ratio ( 75:25 water _ alcohol ) gave a higher value limit of detection and therefore better results . 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 detection limit for each medium.
References used
Jaroon, J.;Ponlayuth, S.; Kate ,G.;Somchai ,L.; Prasak ,T.; Jaroon, J.Cathodic Stripping Voltammetric Procedure for Determination of Some Inorganic Arsenic Species in Water, Soil and Ores Samples. Chiang Mai J. Sci. 2009; 36(3) : 369-383
Aristidis, N.; Anthemidis, G.; Zachariadis, J. 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 547 (2005) 237–242
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
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
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
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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 conditi
ons
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.
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We studied the effect of each of the (PH
value, type, concentration puffer, effect of crippling electrolytes) to determine the arsenic in aqueous media and calibration using a standard solution of iodine. We also worked on raising the sensitivity of the method detection limit access to the ppm.
It should be noted that 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).
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