why we use polystyrene film for ftir calibration?
Answers were Sorted based on User's Feedback
polystyrene film made by polymer of styrene,
it is highly durability.
polystyrene film is all bands executed which cover whole IR
Region.
Is This Answer Correct ? | 7 Yes | 2 No |
Most people are only using FTIR for identification, so
wavelength accuracy is most important.
A polystyrene film is an easy way to calibrate the entire
wavelength range of the instrument. The film produces
sharp absorbance bands at known wavelengths (or
frequencies) which can be used to verify that the
instrument's spectrum is accurate.
And also additionaly other than polystyrene we can use any
other reference material which is having known sharp
absorbence bands at different wavenumbers.
concept is calibrating the instrument against known
material and known results.
Is This Answer Correct ? | 4 Yes | 0 No |
Answer / ch.naresh
it is the one of the USP standard. Included in all wavelengths in entire ir region
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / sachin chauhan
because polystyrene is madeup of polymer of polyethylene
which are highly stable
Is This Answer Correct ? | 1 Yes | 2 No |
what is titrent,& titrate
2 Answers Graviti Pharmaceuticals,
why the most API molecule are in the hydrochloride form?
Which are the diffrent grades of api in pharma?
How to determine water content of thioanisole? which interfere by KF titration?
What are the differences between GC and HPLC?
what does optical rotation and specific rotataion means,difference between them
ash or residue in that what will be there.
2. Two grams of Benzoic acid are dissolved in 200 ml of water and extracted with 200 ml of diethyl ether. The distribution coefficient of benzoic acid is 100, and its dissociation constant is 6.5 10-5. Calculate the distribution ratio (D) of benzoic acid at pH 2, 5, and 6. 3. Calculate D at pH 2 to 10 (1 unit apart) in the above problem, and plot D versus pH.
What is Stray light ? & what is the IMP of this
what is Beer Lambert low ?
How to set analyticl specification for combination products?
What is the main difference between ODS1 and ODS2 Hplc column.