Atomic Spectroscopy using a Constant Deviation Spectrometer with Fabry-Perot Etalon Abstract A constant deviation spectrometer with Fabry-Perot etalon has been used to investigate the various atomic emission characteristics from a Zn-Cd-Hg lamp‚ a low pressure Hg lamp and a Ne lamp. The Fabry-Perot etalon of Free Spectral Range 0.010 cm-1 was used to resolve the fringes of the Hg 546.0731nm spectral line‚ and the 594.4834nm‚ 614.3063nm‚ 640.2246nm and 650.6528nm spectral lines of the Ne lamp
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EXPERIMENT 2 : UV-VISIBLE DETERMINATION OF AN UNKNOWN CONCENTRATION OF KMnO4 OBJECTIVE 1. To determine the maximum wavelength of potassium permanganate. 2. To plot the calibration curve of potassium permanganate. 3. To determine the concentration of an unknown solution of potassium permanganate. APPARATUS Beaker‚ burette‚ glass rod ‚volumetric flask 100ml ‚dropper CHEMICALS Potassium permanganate (KMnO4)‚ distilled water PROCEDURE A. Preparation of the KMnO4 standard solution
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2.7 Raman spectroscopy Principle: Raman spectroscopy is based on the use of a laser light to induce oscillation and rotation in human fluids containing glucose. Because the emission of scattered light is influenced by molecular vibration‚ it is possible to estimate glucose concentration in human fluids [24]. This effect depends on the concentration of the glucose molecules. This technique can measure very weak signals‚ even in human fluids. The wavelength range of Raman spectrum is considered to
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References: [1]Andreescu‚ D. CHEM 223 Spectroscopy Laboratory Fall 2013 Edition; 2013; pp 77-82 [2] Swain‚ J. The Boston Globe‚ 2010. http://www.boston.com/business/articles/2010/03/01/ what_is_tonic_water/ Accessed 10/29/2013
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DATE: 21-01-14 ANALYSIS OF COPPER IN BRASS BY UV – VISIBLE SPECTROSCOPY AIMS/OBJECTIVES; To determine the percentage of copper in brass by UV-visible spectroscopy. INTRODUCTION Electromagnetic radiation‚ of which ultraviolet and visible light are but two examples‚ has properties of both waves and particles
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Absorption Spectroscopy Author: Cesar M. Lemas Lab Partners: Jahnnan Jayesh Patel‚ Myong Ho Lee & Salem Alsaif Instructor: Jordan Andrew Mudery Chem 151‚ Section 7D Date Work Performed: October 18th 2012 Date Report submitted: October 25th 2012 Abstract Absorption spectroscopy is a practical way to find what the light absorption of a substance is‚ and whit this data combining the Beer’s law equation you can determine the concentration of different things in a solution‚ in
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Introduction: The purpose of this lab was to learn how to use a spectrophotometer to measure the amount of light absorbed by different concentrations of salicylic acid‚ compare those concentrations to our unknown sample and to use the data collected to compile a graph showing the levels of absorbance of the different concentrations. Methods and materials: In this lab we used a spectrophotometer‚ a test tube filled with water to be used as a blank‚ six test tubes with different concentrations
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Micro-Raman Spectroscopy Raman spectroscopy is a micro-analytical method that showed many advantages in analysis of cultural heritage materials. It is a form of vibrational spectroscopy that allows the identification of particles in homogeneous materials in the micron order. The identification is employed on the basis of the molecular vibrational spectra of samples‚ obtained by excitation with visible laser light. In micro-Raman spectroscopy‚ the laser beam is focused by means of a microscope
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DEPARTMENT OF CHEMISTRY TITLE: ANALYSIS OF COPPER IN BRASS BY UV-VISIBLE SPECTROSCOPY NAME: OPOKU ERNEST DATE: 21ST JANUARY‚ 2014 Page 1 of 9 TITLE: ANALYSIS OF COPPER IN BRASS BY UV-VISIBLE SPECTROSCOPY AIMS AND OBJECTIVES: By the end of this experiment‚ the student should be able to demonstrate the following proficiencies: 1. To determine the percentage of copper in brass by UV-visible spectroscopy. 2. Properly calibrate and use a spectrophotometer. 3. Convert percent
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X-ray Absorption Spectroscopy X-ray absorption spectroscopy (XAS) techniques probe short- and medium-range order‚ yielding information on bond lengths‚ coordination numbers‚ local coordination geometry and the oxidation state of atoms for a wide range of solid and liquid systems. XAS experiments require an intense‚ tunable photon source only available at synchrotrons. Features • medium and high energy (from atomic number Z=20 upwards) XAS‚ XANES (x-ray absorption near-edge structure)
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