SPECTROPHOTOMETRY Spectrophotometry is the quantitative measurement of the reflection or transmission properties of a material as a function of wavelength It involves with the use of a spectrophotometer. A spectrophotometer is a photometer that can measure intensity as a function of the light source wavelength. A spectrophotometer is commonly used for the measurement of transmittance or reflectance of solutions‚ transparent or opaque solids‚ such as polished glass‚ or gases. Principles
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LI-FI (Light Fidelity)-The future technology in wireless communication Pooja Abhnag1‚ Pratima Tarte2 Department of Electronics & Communication Dr. D. Y. Patil Polytechnic Address 1poojaabhnag13@gmail.com 2tartepratima@gmail.com Abstract— Li-Fi is a new wireless communication technology which enables a wireless data transmission through LED light. Li-Fi is based on a unique ability of solid state lighting systems to create a binary code of 1s and 0s with a LED flickering that is invisible
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space provided. 1. What is a particular advantage of graphite furnace atomic absorption over flame atomic absorption? (a) higher temperature (b) lower S/N (c) less interference (d) small sample amounts 2. In atomic emission spectroscopy‚ it is desirable to have a high concentration of the element in the form of: (a) atoms in the ground state (b) atoms in the excited state (c) ions (d) atoms as compounds 3. Which of the following atomic methods generally provide
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the temperature in air. 2.3.6. Removal of heavy metal ions from water of lake El-Manzala‚ Egypt via adsorption: The removal of heavy metal ions from water of lake El-Manzala‚ Egypt by material samples was evaluated by utilizing atomic absorption spectroscopy (AAS) (Derkin Elmer 2380 spectrophotometer). The tested heavy metal ions included Cd(II)‚ Cu(II)‚ and Pb(II) as examples of heavy metal ions in water from lake El-Manzala‚ Egypt. 3. Results and Discussion 3.1. FT-IR Spectral
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Experiment 11 Title: Spectrophotometric analysis of caffeine and benzoic acid in soft drink. Name: Tan Herh Lim Name of partner: Sia Ting Wai‚ Chong Zheng Yee Date: Lecturer: Dr. Neo Kian Eang Practical class: P1 Objective: To obtain the absorbance of the caffeine and benzoic acid in soft drinks. Introduction Soft drinks that commonly found in our daily life contain caffeine and sodium benzoate. The caffeine act as a stimulant and the sodium benzoate acts as a preservative
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De Leon‚ Jo-Anna Maria N. 3ChEA Group No. 2 Experiment No. 5 Spectrophotometric Determination of pKa I. Introduction The equilibrium constant of the dissociation of an indicator in water will be determined experimentally using spectroscopic method.This experiment aims to demonstrate the principle of equilibrium and the interaction of matter with light. II. Methodology Figure . UV-VIS Spectrophotometer 10 solutions covering the entire pH range from 1 to 13 were prepared
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Materials 1 spectroscope 1 incandescent bulb 1 hydrogen gas discharge tube 1 mercury discharge tube 1 nitrogen gas discharge tube 1 fluorescent light 1 neon gas discharge tube Solar light source 1 discharge tube apparatus Procedure The procedure of using a spectroscope was practiced with a fluorescent light source. The slit was pointed towards the source‚ and the spectroscope was shifted until the spectrum was clearly visible. The appearance of the spectrum from the fluorescent light
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2.5. Characterization Methods 1H–NMR and 13C–NMR spectra of HPPP‚ BOMP and HVPA were taken in CDCl3 on Bruker DPX–300 MHz spectrometer using tetramethylsilane (TMS) as an internal standard. FT–IR spectra of the synthesized compounds‚ HPPP‚ BOMP‚ HVPA and photocrosslinked polymers were recorded on Perkin-Elmer system 2000 (4000–400 cm–1) spectrometer‚ using KBr pellets. Medium pressure mercury vapour lamp to the power output of 125W/cm2 was used for the photocrosslinking study. The viscosity of the
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1.1 DETECTION OF Hg2+ Refer(1) Why is detection of Hg2+ important?? Mercury contamination poses severe health risks. It can enter into environment through natural as well as human activities. Once it enters marine environment‚ bacteria convert inorganic mercury to methyl mercury which enters food chain and is accumulated in large edible fish. Its imbalance can lead to neurological disorders and can cause Minamata disease. Procedure to detect Hg2+ 1. MS1 (Mercury Sensor 1)‚ a water soluble‚ fluorescein
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often as they want. In case you don’t yet a sauna‚ you should consider getting one. You don’t know if you should choose a far infrared or a near infrared sauna? If so‚ then here is the difference between far infrared and near infrared saunas. Energy consumption When it comes to energy consumption‚ a near infrared sauna will definitely use less energy than a far infrared one‚ due to the fact that it operates at a lower temperature. This aspect is extremely important‚ so you better have it in mind
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