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Why pyrene is also use for calibration if detector
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Bcoz. It gives higher absorbance band ,lambda max 373 nm .rather than caffeine. That's why
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Definition of beers_ lamberts law
4 Answers Aarti Industries, Agio Pharmaceuticals, Emcure, Supriya Lifescience,
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.
mode of absorption in alimentary canal?
What are usp limits for total impurities,unknown impurity
what are the different methods of analysing related substances test,what are LOD AND LOQ .HOW TO REPORT IMPURITIES WHEN LOD AND LOQ LIMITS R SPECIFIED
Why monograph of hplc coming upperside of drift but in IR monograph coming in drift side?
how std. of znso4
acetic acid is weak acid & perchloric acid is strong acid.but how perchloric acid is soluble in acetic acid
How require to develop GC method? how to select diluent, GAS, column selection and other chromatographic conditions?
What is the limit for single maximum impurity limit as per USP??
Why a1% value is used for some product ? What is the criteria for selection a1% value ?
why we are analyzing purity on HPLC why not in gc
3 Answers Aurobindo, Reddy Labs,
Organic Chemistry 
