Abstract
This study describes flow-injection spectrophotometric methods for the determination of Ni (ll) Nickel in analytical sample by a new reagent MTDTCH.
An accurate and sensitive flow injection (FI) Spectrophotometric methods have been developed for the determination of ion Nickel (ll) in aqueous solution by preparing the new organic -Schiff base- reagent was prepared by reaction 3-methylthiophene-2-carbaldehyde with hydrazinecarbothiohydrazide. This reagent was worked as a ligand by reacting with the Nickel (II) ion to form a Nickel complex and determination trace amounts of it. The absorbance of the reaction was measured in the injection system which gave the wavelength of 357nm. With a limit of detection of 0.050 µg.mL-1 and a limit of quantitation of 0. 169 µg.mL-1 Relative standard deviation 0.495 and Recovery is 99.50, the metal concentration obeys Beer's law within the range0.5-9.mL-1 with a correlation coefficient value of 0.9997 . The complex composition was specific to the UV-visible spectra. the molar ratio of the metal to the reagent was (1:2).
An accurate and sensitive flow injection (FI) Spectrophotometric methods have been developed for the determination of ion Nickel (ll) in aqueous solution by preparing the new organic -Schiff base- reagent was prepared by reaction 3-methylthiophene-2-carbaldehyde with hydrazinecarbothiohydrazide. This reagent was worked as a ligand by reacting with the Nickel (II) ion to form a Nickel complex and determination trace amounts of it. The absorbance of the reaction was measured in the injection system which gave the wavelength of 357nm. With a limit of detection of 0.050 µg.mL-1 and a limit of quantitation of 0. 169 µg.mL-1 Relative standard deviation 0.495 and Recovery is 99.50, the metal concentration obeys Beer's law within the range0.5-9.mL-1 with a correlation coefficient value of 0.9997 . The complex composition was specific to the UV-visible spectra. the molar ratio of the metal to the reagent was (1:2).
Keywords
Flow injection
MTMTCH
Ni
Spectrophotometric
Abstract
توصف هذا الدراسة الطرق الطيفية للحقن الجرياني لتقدير النيكل الثنائي في عينة تحليلية بواسطة كاشف MTMTCH الجديد طريقة القياس الطيفية طريقة دقيقة وحساسة لحقن الجرياني التي تم تطويرها لتقدير النيكل ايون النيكل في محلول مائي من خلال تحضير كاشف جديد ناتج من تفاعل 3-ميثيلثوفين-2-كربلديهايد مع الهيدرازين كاربوتيو هييدرازيد. كان هذا الكاشف بمثابة ليكند من خلال تفاعله مع ايون النيكل لتكوين معقد النيكل وتحديد كميات قليلة منه. تم قياس امتصاص التفاعل في نظام الحقن الذي اعطى طول موجي ٤٠٠ نانومتر. مع حد كشف قدره ٠.٠٥٠ميكرو جرام مل-١ وحد كشف كمي ٠.٠١٦٩ميكروغرام.مل-١.ويخضع تركيز المعدن لقانون بير لامبرت ضمن النطاق ٠.٥-٩مل مع قيمة معامل ارتباط تبلغ. ٠.٩٩٩٧كان تركيب المعقد خاصا بالأطياف المرئية فوق البنفسجية. وكانت النسبة المولية المعدن للكاشف ١:٢).