analysing the IR spectra of paint samples. How??
114334
IR analysis of substances is very easy. You just put a few milligrams of the (solid, liquid, or gas) sample onto the IR cell, scan with IR and you get the output spectra. You use a guide to interpret the spectra. These are available in chemistry books and in the net. With paint, it depends on which component of paint you wish to analyze. Normally each component - pigment, additives, binders, etc - has its own characteristic chemical, and hence functional groups to look out for. If you don't need the solvent, then evaporate it off and analyze the sample you obtained. You can also do some preliminary separation by chromatography, centrifugation, filtration, etc. Paints indeed give color to life!
262694
If you mean at what wavelength does polystyrene have its strongest absorption in the ir, you may find your answer at the link below.\n\nhttp://webbook.nist.gov/chemistry/name-ser.html\n\nHere you can type in a name and find some physical data. Good luck
930664
I assume by quasion you mean question...\n\nK and Na can be determined qualitatively by a large variety of methods. One of them is inserting their salts in flame and examining the resulting flame color. The color diference is due to diferent energy for atomic excitation. This phenomenon belongs to chemistry but also to spectrometry and physics. \nI hope this answers your questions.
739943
Very simply: Every element when heated gives off a radiation frequency that is specific to itself. When the entire spectrum of light from a star is analyzed, those frequencies representing specific elements are absorbed and show up as dark lines in specific areas. Each star has a unique pattern. After correcting for any red or blue shift ( discuss that another time), the same elements will appear in the same spectral region.
496568
Go to this site..\n\namerican-infrared.com/product/Prod_flir_470_files/Prod_flir_470.html
433170
The company I work for does Salt Spray Analysis. it's used to find out how well a coating holds up under controlled conditions. Salt water is very corrosive to most metals and is a good medium for testing for corrosion.\n\nBasically, a part that has a coating (paint, Anodize, Nitride, Black Oxide,...) is placed in a sealed tank. The tank sprays water with a particuar amount of salt in it into the chamber. The parts are checked every hour, 2 hours, 6 hours...as directed by the requirements. As soon as ANY rust is found, the testing stops and the amount of time it took for the rust to show is recorded. 300 hours is very good for any type of paint.
290835
There are a number of methods. One way is to crash out the cadmium as an insoluble salt and than weigh that salt, to back-figure the cadmium. The problem there is that you would have interferences from many other metals.\n\nSpectrometrically, you could accomplish it using an ICP or simple atomic absorption. The later might require the use of standard addition, particularly if your matrix is complex. You figure out the absorbance after adding known amounts of cadmium.
402176
You're right, spectroscopy is the proper method...Below you'll find a link to a quick and simple explanation.
136909
If you have the letter names, use the Periodic Table of Elements.  If not, use PH paper, and that might help.  Go by color, soluability, and texture.
1063486
FT IR is--Fourier Transform Infrared spectrometry.\nFITR,Spectrometry is an instrumental method that permits simultaneous measurement of of infrared absorption frequencies of chemical species in real time. The spectrometer functions by imparting a different modulation frequency to each individual infrared frequency of wavelength..The amplitude of each frequency detected is used to generate the infrared spectrum.Reduction in the amplitude at any specific frequency is the absorption due to molecular species.\n\nHow it works---most modern FT IR devices use a heated ceramic element. This usually consists of a coiled wire heater that has been coated with ceramic.\n\nWhat applications use FT IR-----FT IR is used for TDT Air Scan analysis, of gas studies,stack emission compliance tests,relative accuracy test audits(RATAS) and Engineering studies.Other uses are performing,molds scans, Trac Scan, Green Scan,Tool Box,IAQ protocol etc.\nWhen it is coupled with thermo Gravimetric Analysis(TGA) it can be used to determine the level of chemical change in the synthetic fuel products.
817601
try the local chemist....
988889
understanding the reaction meachanism \neffect of catalysts etc....\ndetermining the amounts needed
465945
Infrared is not a chemical, it is part of the electromagnetic spectrum, like radio waves, light and micro waves.\n\nInfrared has wavelengths between approximately 750 nm and 1 mm.
311737
infrared and ultraviolet!
746465
take it from here \n\nhttp://www.freedownloadscenter.com/Web_Authoring/Java_Programming_Tools/Larry_s_ Paint.html
139895
2 ways come to mind.\n\nYou make a series of solutions of increasing concentration as well as a blank (deionized water) and measure their absorbance in a spectrometer. You find a regression of the data and figure out the methylene blue based on its absorbance.\n\nStandard addition. You take unknown absorbance and add increasing concentrations of methylene blue to it. Graph the data and figure out the concetration corresponding to the y intercetp.
524118
FT-IR stands for Fourier Transform - InfraRed\n\nIn the pharmaceutical industry, FT-IR systems are used to analyze raw materials or finished producy where identification and purity results are critical and where accurate analysis of intermediates and final products is essential and compliance with FDA and GMP (Good Manufacturing Processes) guidelines must be clearly documented.\n\nBasically, it's the PRO version of the simple flame test that we used to do in high school chemistry class where you burned different chemicals and determined what they were from their color.  FT-IR's do extreme analysis, but along the same lines.