i want to know about the Atomic Adsoption spectroscopy?
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This is a particular device which is used to analyze the concentration of known metal elements that are present in a given sample.  For example, if you have a sample that you know contains aluminum, AAS will tell you how much aluminum is present.\nThis device can be applied to a vast number of industries and has a wide range of use.\nIt is often used in the chemical / pharmaceutical / biotechnology industries to analyze raw materials used in production for concentrations of metal impurities.\nAnother use of AAS is for determining the age of samples.  Say you have a painting or a piece of pottery and want to know how old it is.  By analyzing the paint or clay by AAS, you can determine how much and how many metals are present.  This information can usually give you a range of dates as to when it was made.  \nSo, AAS is used anywhere you are trying to measure the concentration of trace metal elements in a given sample.
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these links might help:\n\nhttp://zahry.usm.my/CAI_CBL/15-42426/_main/assign3/312fou.htm\n\n\nhttp://environment.uwe.ac.uk/video/cd_hdef/topic%20foundations/section2.htm
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Look up in preferred order: \n(1) Inductively coupled plasma mass spectrometry\n(2) Atomic absorption spectrometry\n(3) Anodic stripping analysis\n(4) Colorimetric methods for heavy metals
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Look at the links at\n\nhttp://www.itt.edu/staff/boyter/links/index.html#CHEMISTRY_ANALYTICAL
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You should try the "Physics Handbook", the "Handbook of Thin Film Technology"\n\nThe Handbook of Physicochemical Properties of the Elements (but this one may be available only in russian).\n\nYou may also try this article in an university library:\n\nL. Vitos, A. V. Ruban, H. L. Skriver, and J. Kollar, The surface energy of metals, Surf. Sci. 411, 186 (1998).
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Here you have a free downloable PDF presentation from the 28 Sep 05 Conference Micro & Nano Technology (MNT) Measurement Club. I think it's worth to have a look.\n\n"Measuring Nanoparticle Surface Area and Porosity by Gas Sorption"\nMike Tucker, Quantachrome UK\nThe technique of gas sorption has long been used for the determination of surface area and pore size distribution of particulate systems and porous solids. While traditional sorption systems have proved adequate for the majority of tasks, the latest generation of ultra-fine materials, often coupled with microporosity offer new challenges to the sorption scientist. To meet these challenges many new developments have been made in the fields of analytical instrumentation and software modelling. The presentation will review some of the new techniques available, and provide examples to illustrate their applicability to the field of nanotechnology.\nDownload presentation: http://www.npl.co.uk/php/docs/download.php?area=metrology_clubs&path_name=/metrology_clubs/mnt/meetings/28sep05/presentations/connagh.pdf
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You're right, spectroscopy is the proper method...Below you'll find a link to a quick and simple explanation.
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http://www.olysun.com/Chem_121/Soln.html\n\n\ncc
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http://www.chemguide.co.uk/atoms/bonding/vdw.html
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i have not heard of spectroscopy being used to determine the amounts of gases, but i guess you could by looking at how deep the colours are. If the colours are paleish = not alot,etc
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If you want serious nanochemistry, look for ALD - atomic layer deposition.  Dr Sean Barry at Carleton University in Ottawa, Canada works this kind of nanochemistry.
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go to\nwww.chemistry.com
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Are you asking for an explnation for the spectral proprties  or doy ou want the actual spectral report? either way go here....http://orgchem.colorado.edu/hndbksupport/irtutor/estersir.html
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http://www.chemicalelements.com/\n this is an interactive site that allows you to look us any of the elements and get information about each
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See links and sublinks at http://www.itt.edu/staff/boyter/links/index.html#CHEMISTRY_ANALYTICAL
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Look up the site chemfinder.com.  its a good website if you have not heard of it already.
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I was recently looking at one that contains many applets that help to visualize the structure of many compounds and atomic latices. (See 1st link, below)\n\nBut that may not be what you're looking for. If you could narrow your question down to a certain part of chemistry or a certain reaction, etc... that would help.\n\nIf not, then the second link is a cool site that has many interesting easy-to-understand concepts accompanied by some fun applets. (See 2nd link, below)