Instrumental Analysis EXAM Essay Example | Topics and Well Written Essays - 750 words

Instrumental Analysis EXAM - Essay Example Infrared rays are used in analysis of the structure of organic compounds by examination of the chemical bonds. Microwaves are utilized in protein hydrolysis that is essential in amino acid evaluation. Radio waves are used in the chemical analysis of drugs. They are also utilized in evaluating the electronic conditions surrounding the nuclei (Sharma S-3 - S-12). Question 2: The energy across the EMR spectrum varies by decreasing from the gamma, to UV, to visible light, to IR, to microwaves and finally to radio waves. The frequency of the waves is highest in gamma rays and the radio waves have the least frequency just as arranged above. The radiation is determined by the energy levels; hence, the radiation also decreases in the order arranged above (Sharma S-3 - S-12). Question 4: A diode is a device that only permits current flow in a single direction. It functions to detect light though the creation of an electron-hole when a photon with enough energy hits it. It does this through the forward and reverse-bias. If the polarity is such that the electrons are permitted to move through the diode, it is termed as forward bias, however, if the diode hinders their flow, then it is called reverse bias. A diode array is a system that has several photodiode units. It is used in the obtaining of qualitative features of compounds in liquid chromatography. A charged coupled device (CCD) functions by having light interrupt the photodiodes. The photodiodes that are reverse-biased lead to the capacitor been discharged at a proportional rate to the amount of photon release. The released charge is transmitted to a shift recorder with the aid of the closing of a sequence of switches. After which, the switches open once the shift is recorded recharging the capacito rs. An A/D converter helps in obtaining the data, which is displayed on a computer (Park 1-15). Question 6: A photomultiplier functions by