Spectroscopy

IR SPECTROSCOPY: DETERMINATION OF XYLENES USING AN INTERNAL STANDARD Manal Alrashidi 04/18/2018 CHEM 790.1, sec.01- spring 2018 Chemistry and Biochemistry Department Queens College- CUNY 65-30 Kissena Blvd, Flushing, NY 11365 Professor Edward G. look Abstract In this laboratory session, I determined the concentration of p-xylene and m-xylene in two unknown samples, using o-xylene as an internal standard. The analysis was done using Fourier Transform Infrared spectrometry. The peak wavelengths of

size of the synthesized nanocomposite is in the range 4-11nm. The grain size increases when the temperature is increased due to the agglomeration of nanoparticles. The Fourier Transform Infrared Spectroscopy (FTIR) studies confirm the presence of PO43-, CO32- and Mg2+, and OH- groups. The UV-VIS Spectroscopy measurements show the reduction in the band-gap upon the temperature. Transmission Electron Microscope (TEM) images ascertained that nano HAP/MgO at 2500C and 3000C composite shows flakes like

Recently, the synthetic chemists have gradually taken concern of the compounds containing nucleus of 3,4-dihydropyrimidin-2(1H)-one, which have a series of pharmacological characteristics, such as calcium channels blockers, antioxidant, anticancer, and antiinflammatory activities [1-5]. But their efficiently utilizing is boxed in low water solubility. The sulfonate group is strongly acidic. As a result, it is expected that the solubility of 3,4-dihydropyrimidin-2(1H)-one derivatives could be greatly

Light, Color, and Solutions Lab In this experiment, the relationships between wavelength, absorbance, concentration, and cell path are explored through separate, smaller experiments. These relationships can be combined to derive a single equation known as Beer’s Law. This equation is then used to identify an unknown solution’s formula weight. A traditional artist’s color wheel, using pigments, consists of the colors of the rainbow. A color wheel using light, which is known as a chemist’s color

Drug content estimation Spray dried powder samples (5 mg) were weighed accurately and dissolved using a mixture of water/ methanol (80:20% v/v) in a 100 mL volumetric flask. The flasks were shaken at room temperature for 60 min on an orbital mixer incubator (Ratek Instruments Pty. Ltd., Victoria, Australia) at a speed of 200 rpm followed by bath sonication using an ultrasonic cleaner (Misonix Inc., NY, USA) for 15 min. The solutions were filtered, and the drug content of filtrates was quantified

The full procedure for each of these sections can be found in the PSU Chemtrek.5 In Section A, Atomic Absorption Spectroscopy was used to determine water hardness. I filled two pipets with my water sample to perform the Ca2+ analysis and the Mg2+ analysis separately. The absorbance values for both elements are then calculated using the process described in the introduction.5 Some water samples needed to be diluted due to their high concentration of ions but this was not the case for my sample.

the standard deviation of incident light N is the # of photon counts. The standard deviation of glum is calculated by using delta=IL -IR=square root 2N. The lanthanide circulatory polarized luminescence does depend on the glum value (3,4). In CPL spectroscopy one measures the luminescence dissymmetry factor, glum, which is related to the intensity of left and right circularly polarized emitted light (3). CDL measures the difference in absorption between left (molar absorption coefficient (L) and right

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

Based on the above mentioned structural and morphological results, the sample SP0.10 has high degree of crystallinity with narrower particles size distribution, Therefor this value was selected as optimum degree and checked the effect of gel making agent on it. Experiments SP0.10, SP0.10A and SP0.10B were an optimization set for the citric acid (CA) and ethylene glycol (EG) as gel making agent shown in table-1. The common small organic molecules used in sol–gel chemistry are citric acid. Citric acid

DATE PERFORMED: JULY 20, 2007 SPECTROPHOTOMETRIC DETERMINATION OF EQUILIBRIUM CONSTANT FOR A REACTION ABSTRACT UV-VIS spectrophotometry is one of the most widely-used methods for determining and identifying many inorganic species. During this experiment, this spectrophotometry was used to determine the equilibrium constant, Keq, of the Fe3+(aq)+SCN-(aq)↔ FeSCN2+(aq) reaction. By determining the amount of light absorbed, the concentration of the colored FeSCN2+ solution was also quantitatively