JFAS_Vol 15 N 02
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Item A NEW TECHNIQUE FOR SWEAT CHLORIDE DETERMINATION USING MOHR’S SILVER METHOD: DEVELOPEMENT AND ANALYTICAL VALIDATION(university of el oued/جامعة الوادي, 2023-03-17) Laoufi, Nardjess Rim; Bouchenak, Farida; Zouakh, Amina; Abdelaziz, Mouna; Zerrouk, Abdelhakim; Saddouki, DjamalThis study presents a new technique for determining chloride ions in the sweat test for the diagnosis of cystic fibrosis. The technique developed is based on Mohr’s silver titrimetric method. The analytical development was performed on three quality control levels (C1, C2 and C3 at 25, 45 and 65 mmol/L respectively) and validated according to the requirements of ISO15189. Repeatability was estimated by the coefficient of variation (CV) at 2.45%, 3.12% and 2.21% for C1, C2 and C3. The CV estimated the intermediate precision at 4.12%, 4.51% and 2.63% for C1, C2, C3. The bias estimated the accuracy at 0.99% for C1, 2.76% for C2 and 2.55% for C3. The assays were performed following a linear calibration curve (equation: Y=0.0001 X + (3 x 10-5) with R2 =0.9995) between 0 and 150 mmol/L. This new technique is a simple and fast alternative using stable and less toxic reagents than the mercurimetric technique.Item MILD STEEL CORROSION INHIBITION IN ACIDIC MEDIA USING SARCOCEPHALUS LATIFOLIUS LEAVES EXTRACT(university of el oued/جامعة الوادي, 2023-03-29) Iorhuna, Fater; Ayuba, Abdullahi MuhammadAt temperatures between 303K and 323K, three different concentrations of the methanol extract from Sarcocephalus latifolius were utilized to inhibit the corrosi on of mild steel coupons in a 0.9M HCl solution. The plant extract adhered to the surface of mild steel metal under the investigated conditions, according to surface characterization techniques including SEM and FT IR. It has been proven through weight los s trials in this work that the plant extract's ability to suppress growth improves with both an increase in its concentration and a decrease in temperature. The corrosion and inhibition processes were presented as being viable and spontaneous using thermod ynamic para meters. Additionally, it was determined that the inhibitory process followed first order kinetics, with half life values rising as plant extract concentration did. Calculated activation energy values and isotherm characteristics demonstrated tha t the proce ss adheres to the physical adsorption mechanism.Item ASSESSMENT OF SOME HEAVY METALS AND PHYSICOCHEMICAL PARAMETERS IN HAND DUG WELL AND BOREHOLE WATER SAMPLE F ROM MUBI SOUTH L.G.A ADAMAWA STATE(university of el oued/جامعة الوادي, 2023-03-26) Abubakar, Muhammad; Sirajo, Ibrahim TajoAn att empt has been made to detriment the concentration level of some heavy metals and physicochemical parameters in hand dug Well and Borehole water of Mubi local govern ment area of Adamawa state with the aid of AAS , pH and conductivity meter. W ater samples wer e collected from ten sites which serves as drinking water sources and subjected to anal ysis for determination of Pb , Cd and Cr. The result s hows equal concentration of Pb 0.048±0.00 mg//L) detected from three samples, th e concentration level of Cd and Cr ranges between 0.088 to 0.439 mg/L and 0.250±0.165 to 0.750±0.333 mg/L respectively, this indicate that all the thr ee heavy metals detected were above the standard limit set by WHO and SON for drinking water. pH, conductivity and TDS values ranges between 6.94 to 8.14, 362 to 1063 µS/cm and 199.10 to 584.65 mg/L respectively, these were less than the value set by WHO.Item RESPONSE OF OKRA CULTIVARS A belmoschus esculantus (L.) M eonch TO THE DIFFERENT LEVELS OF NITROGEN AND DI AMMONIUM PHOSPHATE(university of el oued/جامعة الوادي, 2023-03-25) Hussein, Abdalla MohamedAn experiment conducted to know t he effect of nitrogen and DAP on growth and yield of okra cultivars. It laid down in ( SRCD), with three replic ations. The treatments are control Co , two levels of nitrogen and DAP referred to as; N 1 , N 2 , D 1 , and D 2 , it is equal to 0, 36, 72, 72, 144 g plot 1 , respectively, and cultivars of Bassnty, Jamoia, Khartomia . The results revealed that treatments significan tly affected all parameters except yield per plant and hectare. Higher nitrogen gave the heaviest fresh and dry weight, while control gave higher dry matter. The greatest number of pods per plant recorded by the higher dose of DAP. Bassanty significantly i ncreased vegetative and productive parameters and slightly pod yield per plant. Bassanty received the higher dose of DAP significantly increased g rowth, while Jamoia with lower dose of nitrogen increased yield components. This result concludes th at the att ributes of okra influenced by both treatments.Item A NEW TECHNIQUE FOR SWEAT CHLORIDE DETERMINATION USING MOHR’S SILVER METHOD: DEVELOPEMENT AND ANALYTICAL VALIDATION(university of el oued/جامعة الوادي, 2023-03-13) Laoufi, Nardjess Rim; Bouchenak, Farida; Zouakh, Amina; Abdelaziz, Mouna; Zerrouk, Abdelhakim; Saddouki, DjamalThis study presents a new technique for determining chloride ions in the sweat test for the diagnosis of cystic fibrosis. The technique developed is based on Mohr’s silver titrimetric method. The analytical development was performed on three quality control levels (C1, C2 and C3 at 25, 45 and 65 mmol/L respectively) and validated according to the requirements of ISO15189. Repeatability was estimated by the coefficient of variation (CV) at 2.45%, 3.12% and 2.21% for C1, C2 and C3. The CV estimated the intermediate precision at 4.12%, 4.51% and 2.63% for C1, C2, C3. The bias estimated the accuracy at 0.99% for C1, 2.76% for C2 and 2.55% for C3. The assays were performed following a linear calibration curve (equation: Y=0.0001 X + (3 x 10-5) with R2 =0.9995) between 0 and 150 mmol/L. This new technique is a simple and fast alternative using stable and less toxic reagents than the mercurimetric technique