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 o
f 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.
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.
This research aims to study the effect of certain analytical conditions to determine the arsenic in aqueous media using a Potentiometric, and then choose and adopt the optimum conditions for this determinism.
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).
The study showed that the PH value appropriate for calibration of arsenic with iodine (8-9), also found that the response process of arsenic on the electrode platinum has been excellent when using Na2SO4 as puffer with concentration of 0.1 M, which has been successfully used to quantify arsenic As+3 up to detect up to 2 × 10-6M.
As it turns out during the study, it was not possible to determine the arsenic presence of copper ions in the solution, while the presence of lead and sulfate ions and chloride was not affective.
