Electromagnetic spectroscopy Essays

Spectroscopy deals with the production, measurement and interpretation of spectra due to interaction of electromagnetic radiation with matter which is absorbed or emitted by atoms of a sample. This absorption or emission occurs when the atoms of the sample move from one energy level to another in presence of light. In other words, it is a science which deals how light interacts with matter. When atoms or molecules absorb electromagnetic energy, the incoming energy promotes the molecular system to

The Uncertainty principle In 1927, Werner Heisenberg was working at Bohr’s research institute in Copenhagen, Denmark. Neil Bohr and Heisenberg were working closely together on theoretical investigations of quantum theory and nature of physics. Heisenberg was left back at the centre alone when Bohr was away skiing. At this point, Heisenberg realized the limits of physics and physical reality. He realized that it in the act of observing, the observer somehow, manages to alter the reality. This observation

IR spectra were collected for the given sample, SMH, as well as many provided sweet substance that could have been the composition of the unknown sample. Each spectrum was collected from 700 cm-1 to 1600 cm-1. The unknown sample IR is shown in Figure A. The goal of this experiment was to determine the composition of this unknown sample. To do this, we obtained IR spectra of Sugar Free Vermont maple syrup, honey, agave, Karo, Mrs. Butter-worth’s maple syrup, molasses, and pure maple syrup. These samples

The purpose of this lab was to figure out what the relationship between atomic line spectra and atomic structure is by using spectroscope scale reading methods to explore the lights emitted by different hydrogen or metals in heated in a flame. During part one, the spectroscope was calibrated to correct for systematic error by comparing the experimental wavelengths to the known or provided wavelength. The scale positions of the different colored lines: violet, blue,yellow, and green were recorded

placed in a 100-mL volumetric flask along with 10.0-mL 0.10m HCl and diluted. Then, the UV absorbance of the five standards was taken. Water was used in the reference cuvet. The wavelength of the peak absorbance for caffeine was also taken. The spectroscopy machine automatically corrected the absorbance values against the baseline of the water reference. The results were graphed to create an absorbance versus molar concentration calibration curve. Finally, the UV absorption of the soda sample was

secondary sulfonate isomers. The analysis of each isomer is important for the elucidation of reaction mechanism of sulfoxidation and their physical properties. The authors carried out the isomer analysis of PS by means of Nuclear magnetic resonance spectroscopy (NMR) method with the NMR shift reagent, Eu (dpm). In the ordinary NMR spectrum of methyl alkyl sulfonate, the information on the position of sulfonicgroup could not be obtained. It was found that methyl signals of ester group shift toward lower

and percent yield was calculated (65.5%) with the limiting reagent being tetraphenylcyclopentadienone. The melting point was determined. The first melting point was 204-204.9 °C and the second melting point was 215.6-215.9°C. Finally, an infrared spectroscopy was obtained for the

In this experiment, the goal was to identify the unknown monoterpene assigned by infrared spectroscopy, ultraviolet-visible spectroscopy, and 1H NMR spectroscopy. The hypothesis was that the unknown monoterpene was citronellol. The hypothesis was confirmed through the spectroscopes conducted. The ultraviolet-visible spectroscopy showed a 214nm with an absorbed energy of 1.006ε. Since it was under 220nm, it showed that there was only one double bond in the molecule. The infrared frequencies did not

Discuss why EDTA and Erio-Black T are good substances to use for testing the water samples in this experiment. (Hint: Consider the complexation reactions, presence of Mg2+, Kf, and color in your answer.) EDTA is a good substance to use for testing the water samples in this experiment because it reacts will the metals to produce a one to one ratio of EDTA to metal complexes. In addition, the reaction equilibrium favors the formation of the EDTA to the metal complexes, therefore making it a good indicator

1INTRODUCTION This experiment was carried out to test the hypothesis that, by analyzing the absorption spectroscopy of an unknown sports drink and different dyes, the concentrations of dyes present in the drink could be determined and therefore allow for the recreation of the sports drink color. The objective was to relate wavelength, absorption, and concentration in order to solve the problem of correctly imitating the given drink. The theory of using a mass spectrometer to create absorption spectra

Figure ( 1 ) shows the XRD for bismuth borate glass samples containing molybdenium oxide from 0 to 20 mol %. From figure (1) can observe that the samples containing molybdenium oxide up to 15mol%MoO3 are in the amorphous state. Then the sample containing 20mol% MoO3 are I the amorphous and crystalline state. The analysis of the sample containing 20mol% MoO3 poured between two copper plates or poured at air, the x-ray diffraction patterns indicate the formation of Bi2MoO6 crystalline phase formed

Analysis of Colas Brandi Ingram Chemistry 1011 Laboratory, Section 008-129A Instructor: Paul Haupt-Renaud November 15, 2014 My signature indicates that this document represents my own work. Excluding shared data, the information, thoughts and ideas are my own, except as indicated in the references. Discussion and Explanation: How the Spec 20 works: The first goal of this lab was to develop a complete understanding of the Spectronic 20, in terms of how it works, and all of its components

Index 1. Introduction Spectroscopy is a term which refers to the interactions of various types of electromagnetic radiation with matter. It is also a study of the absorption and emission of light and other radiation by matter. Dependence of this process related to the wavelength of the radiation. Spectrometers are used to measure the properties of light over a specific portion of the electromagnetic spectrum. Fig 1: Dispertion

Iron phostate, also extensively known as FePO4, was studied through a special type of transformation process known as neutron powder diffraction. The transformation process uses a temperature that ranges from 297K to 1073K. As long as it is within the low temperature range, it is defined as the ‘α’ phase. Otherwise, if it is within the high temperature range, it is defined as the ‘β’ phase. The iron phostate will change its tetrahedral form in the low temperature range to its octahedral form in high

Absorption Spectroscopy (AAS) instrument and how it works. The experiment consisted of making standard solutions that contained manganese (Mn) and 5% concentrated nitric acid (HNO3) and measuring them for absorptions in order to use that with a calibration plot and find the concentrations of two unknowns. Two unknowns were also measured along with a CAL ZERO used as the blank. The standards were diluted to fit within the Mn linear range of 2 to 30 ppm in atomic absorption spectroscopy. These four

The purpose of this experiment is to learn about the principles of protein assays as well as to learn how to utilize the Beer-Lambert Law by doing various calculations such as how to calculate absorbencies, concentrations, and extinction coefficients. According to the Beer Lambert Law, absorbance is proportional to path length and concentration. For this experiment we will be learning how to use a spectrophotometer which measures transmitted light intensity. Spectrophotometers measure wavelength

A In this experiment, the determination of the concentration of zinc and copper in unknown # 2031 was done through standard addition and atomic absorption spectroscopy. Atomic absorption spectroscopy is a process that involves atomizing the analyte sample once it is subjected to a flame. In this atomization process, the analyte sample becomes vaporized before solidifying into atoms where it becomes atomized (Harris, 454-455). Furthermore, depending on the lamp utilized in the experiment, the hollow

1.1. UV-SPECTROPHOTOMETRY Spectroscopy is the measurement and interpretation of electromagnetic radiation absorbed or emitted when the molecules or atoms or ions of a sample move from one energy state to another energy state. Spectroscopy is a general methodology that can be adapted in many ways to extract the information you need (energies of electronic, vibrational, rotational states, structure and symmetry of molecules, dynamic information). Ultraviolet-Visible Spectrophotometry is one of

Melting points reported were determined in open capillary. The structures of the newly synthesized compounds were established using IR, 1H NMR, 13C NMR and LC-MS data. FT-IR Spectra was recorded on Jasco FT-IR Spectrometer, 1H NMR and 13C NMR were recorded in DMSO-d6 at 399.65 MHz and 100.40 MHz respectively. All the chemical shifts were reported in parts per million (ppm). LC-MS was recorded using Waters Alliance 2795 separations module and Waters Micromass LCT mass detector. Elemental analysis

Introduction: The objective of this experiment was to use a spectrophotometer to calculate the absorbance wavelength for the commercial dyes that were given. Light is composed of tiny particles that are called photons, just like matter is composed of tiny particles called atoms. Using the spectrophotometer you can see that different dyes absorb at different wavelengths. With all of the experimentation done the concentration, absorbance and the max wavelengths should be found. Figure 1: Schematic