'Mol 1 cm 1' presentation slideshows

Mol 1 cm 1 - PowerPoint PPT Presentation

Micro-determination of Vanadium using 1-(2-Quinolylazo)-2,4,5- trihydroxybenzene as an Analytical Reagent

Micro-determination of Vanadium using 1-(2-Quinolylazo)-2,4,5- trihydroxybenzene as an Analytical Reagent

A sensitive and selective spectrophotometric method is proposed for the rapid determination of vanadium using 1- (2-quinolylazo)-2,4,5-trihydroxybenzene(QATB). Alcoholic solution of QATB form a 1:2 dark brown complex with vanadium(V) ions at pH ranges 6.0-7.5, absorbing maximum at 590 nm. The molar absorptivity and the Sandell’s sensitivity of the complex are 2.55 X104 L mol-1 cm -1 and 0.002 µg cm-2 respectively. Beer’s law was followed up to 2.4 ppm with the optimum concentration range of 0.32- 2.0 ppm. The tolerance limits for interfering ions are discussed. All variable were studied in order to optimize the reaction conditions. The efficiency of the proposed method is shown by the successful determination of traces of vanadium in some synthetic mixture of minerals and alloys.

★ ★ ★ ★ ★

74 views • 5 slides
Solvent Extraction and Spectrophotometric Determination of Nickel II using 2 - Hydroxy 1 Naphthaldehyde Thiosemicarbazon

Solvent Extraction and Spectrophotometric Determination of Nickel II using 2 - Hydroxy 1 Naphthaldehyde Thiosemicarbazon

2 hydroxy 1 naphthaldehyde thiosemicarbazone HNT is synthesized in laboratory and characterized by NMR, IR and elemental analysis for its purity. This reagent forms a yellowish green coloured complex with Ni II which can be quantitatively extracted into ethyl acetate at pH 7. Complex in ethyl acetate shows an intense absorption peak 430 nm. It is observed that Beer's law is obeyed in the range of 10u00b5-g to 100u00b5-g of metal solution. It gives linear and reproducible graph under appropriate conditions, the complex having a molar absorptivity of 0.275 x 10 6L mol 1 cm 1, Sandell's sensitivity calculated was found to be 0.275 x 102 u00b5-g cm 2 .Nature of the extracted complex, determined by Job's continuous variation method, Slope ratio method and Mole ratio method shows that the composition of Ni II HNT is 1 1. Interference by various ions is studied and masking agents used where required. The proposed method has been applied for the determination of Ni II in various samples. The results of the analysis are found to be comparable with those obtained by standard method. Pradnya Lokhande "Solvent Extraction and Spectrophotometric Determination of Nickel (II) using 2 Hydroxy 1- Naphthaldehyde Thiosemicarbazone (HNT) as an Analytical Reagent" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-3 , April 2019, URL: https://www.ijtsrd.com/papers/ijtsrd22964.pdf Paper URL: https://www.ijtsrd.com/chemistry/analytical-chemistry/22964/solvent-extraction-and-spectrophotometric-determination-of-nickel-ii-using-2-u00e2u20acu201c-hydroxy-1--naphthaldehyde-thiosemicarbazone-hnt-as-an-analytical-reagent/pradnya-lokhande

★ ★ ★ ★ ★

68 views • 4 slides

View Mol 1 cm 1 PowerPoint (PPT) presentations online in SlideServe. SlideServe has a very huge collection of Mol 1 cm 1 PowerPoint presentations. You can view or download Mol 1 cm 1 presentations for your school assignment or business presentation. Browse for the presentations on every topic that you want.