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Sharp line source:
When the bandwidth of the primary radiation is low with respect to the profile of the analyte absorption, the given amount of analyte would absorb more radiation. Thus, the radiation sources having low widths of the emitted analyte lines are preferred. A continuous radiation sources on the other hand have low radiant densities and do not provide sufficiently high sensitivity.
Alkali metals have low ionisation energies and even at the low temperatures obtained in the flame a sufficient amount of the sample may be in the excited or ionised state. That means that the concentration of the analyte atoms in the ground state will not be a true representation of the analyte concentration. As the AAS method depends on the radiation absorption by the analyte in ground state it is not ideal for such determinations. Flame photometry would be the method of choice for such determinations.
Distilled water A kettle can be used to give boiling water, which is then condensed in a jam jar fitted with a big cork and immersed in a pan of cold water. Rubber tubing, adhe
Q. An aqueous solution of the protein bovine serum albumin, containing 2:00 x 10 -2 g of protein per cubic centimeter, has an osmotic pressure of 8.1 x 10 -3 bar at 0 C. Estim
Two element have electronegativity of 1.2 and 3.0. Bond formed between them would be: (1) Ionic (2) Polar covalent ( 3) Co-ordinate (4) Metallic A ns: Ionic
1. Consider a platinum crystal structure (FCC, R Pt = .139 nm). a. Sketch the (100), (110), and (111) planes (including the atoms in the second layer if they can be observed
a. Calculate the global radiation density (kWh/m 2 ) received by five panels located in San Jose on July 1, 2012: Panel A: Tilt=37.3 o , Azimuth=180 o (South) Panel B: Ti
what/s this test
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what is meant by 100% current efficiency in electrogravimetry
what is electronic displacements?
For the formation of covalent bond, the difference in the value of electron egativities should be: (1) Equal to or less than 1.7 (2) More than 1.7 (3) 1.7 or mor
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