Ms. Wilson Chem‚ Blk 10 31 October 2012 Atomic Emission Spectra Lab Atomic spectroscopy is the determination of elemental composition by its electromagnetic or mass spectrum. An arrangement of all wavelengths of electromagnetic radiation is called the spectrum; the plural being spectra. As light passes through a prism‚ the frequencies of light emitted by an element separate into separate lines to give the atomic emission spectrum of the element. There are two spectrums in the lab: the incandescent
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Stream- Line imaging‚ available on inVia Raman microscopes‚ was applied to scan several areas on the painted surface in few minutes. Spectral acquisition was performed by (WiRETM‚ version 3.0) software. StreamLine Plus uses optics within the InVia Raman microscope to illuminate a line on the sample. The In- Via’s motorized microscope stage moves the sample be- neath the objective lens so that the
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Lab #4 Emission Spectroscopy and Flame Test Date of Lab: 10/24/13 OBJECTIVE To observe a continuous spectrum‚ emission spectrum‚ and an absorption spectrum‚ and be able to distinguish among the three. To be able to identify metal ions by doing a flame test and looking at a spectrum. At the same time increasing the ability to use and understanding of lab equipment‚ in this case‚ a spectroscope. To be able to calculate the frequency and energy of certain frequencies of light. PROCEDURE
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EXPERIMENT : Iron in Breakfast Cereal by Atomic Absorption Spectroscopy OBJECTIVES : 1) To determine the actual iron content of different brands of cereals 2) To compare the experimental results with the values listed on the manufacturer’s labels. INTRODUCTION : Iron is one of the important minerals that is required for our bodies to function properly. Most of the iron in our body is found in the blood such as haemoglobin‚ approximately 60 -70% of the human body’s iron is found
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The natural plant exudate gum tragacanth is obtained from the stem of the bush like plant “goat’s-horn”‚ Astragalus species. Gum tragacanth has been used commercially for well over 2000 years and is currently widely used as a thickener and emulsifier in emulsion systems in different pharmaceutical‚ food‚ cosmetic and diverse industrial uses. In addition‚ it is on the list of stabilizers that are permitted by Food and Agriculture Organization/ World Health Organization that could be used during the
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Korea and ‡ Department of Chemistry and § Department of Physics‚ Columbia University‚ New York‚ New York 10027‚ United States ABSTRACT Using micro-Raman spectroscopy and scanning tunneling microscopy‚ we study the relationship between structural distortion and electrical hole doping of graphene on a silicon dioxide substrate. The observed upshift of the Raman G band represents charge doping and not compressive strain. Two independent factors control the doping: (1) the degree of graphene coupling to
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Experiment 2 Quantification of Proteins in Solution by Spectrophotometer Lab bench# 1 Introduction: Absorption spectroscopy is a common method for finding the concentration of proteins or protein complexes in a solution. Proteins absorb light at specific wavelengths and can be defined by the equation A = log (Io/I). This equation states that an absorbance at a specific wavelength‚ A is equal to the log of the ratio of incident light intensity (Io)‚ to transmitted light intensity (I). A
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v.13‚ p. 79 – 81. 17. Yokota‚ Fumiaki‚ Shimizu‚ Aviko‚ Gshizuka‚ Toshio and Morikawa Hisashi (2000). Bunseki Kagaku‚ v.49‚ p.765 – 769. 18. Satyanarayana‚ K (1996). Atomic Spectroscopy‚ v. (17)‚ p. 69 – 76. 19. Winge‚ R.K.‚ Fassel‚ V.A.‚ Peterson‚ V.J and Floyd‚ M.A (1985). Inductively Coupled Plasma atomic emission spectroscopy – An atlas of Spectral Information‚ Physical Sciences Data‚ Elsevier‚ Amsterdam‚ p. 20. Govindaraju‚ K (1994). Geostandards Newsletter‚ v. 18‚ p.19. Table 1 - Operating parameters
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contains 39 questions including sub question of match the following and main questions. 1. Due to heavy traffic near the school the department of traffic police wants to install automatic traffic lights. This am be done by using the Principle of a) Raman effect b) Radiography c) Holography d) Photoelectric effect 2. Water is to be sterilized for drinking purpose without using any chemicals this can be done by using a) u v rays b) visible light c) short wave length radio waves d) long wave length Radio
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2012. <http://www.chemguide.co.uk/analysis/uvvisible/beerlambert.html>. 2. Tissue‚ Brian M. "Beer-Lambert Law." The Innovative Teaching Laboratory. Science Hypermedia Homepage‚ 1996. Web. 17 Mar. 2012. <http://itl.chem.ufl.edu/3417_s98/spectroscopy/beerslaw.htm>.
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