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 Categories >> Sciences >> Chemistry >> Analytical Chemistry
 
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Question Asked @ Answers Views     Select
pharma industries oriented    0  21
what is internal standard define    0  30
Why we have to take 42gm of sodium hydroxide instead of 40gm for preparation of 1M Sodium hydroxide as per Pharmacopia? Whether it means the formula for calculating molarity was wrong?     0  42
what is the diference between spectroscopy and chromatography    1  114
what is the basis of separation in chromatography?    0  102
what is the difference between hplc and uplc?    0  139
how can u seperate polar compounds in hplc ?    0  90
how will you do the prep for unstable componds?    0  48
what is the maximum flow rate in prep hplc    0  56
can i use hplc detector to uplc and why?    0  48
Please tell me about the pH of Polycaboxylic ether is it in the 5-6 range ever or more than 6    0  632
Why base line not start from zero in GC Chromatography analysis.    0  590
What is Formula of Potency calculation on Dried basis, As is basis& Anhydrous basis.    1  2149
What is the difference between STANDARDIZATION and CALIBRATION of instrument like KF? why do we standardization of KF everyday? Why the KF factor being only 5.02 etc?     1  4615
using gradient pressure in gas chromatography are not ?using gradient pressure why    0  1235
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Un-Answered Questions
 
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what is impurity profile. how to interpret this impurity profile to a drug product or drug substance. 344
What is use of LOD and LOQ in validtion and give range and in calculation why we use 3.3* LOD here why we use 3.3 609
Why pH Range has been fixed as 0 to 14 ? 886
why sre you used Potassium hydrogen phthalate in standarisation of 1N NaOH and 0.1 N Perchloric Acid? 3548
what is motor rotation in case of sucrose 240
why using Potentometry What Purpose? differance between manual and potentiometry? why using Some of materials in usig potentiometry? What is use of mericuric acetate in Potentiometry 1461
can i use hplc detector to uplc and why? 48
sop of a uv visible spectrophotometer double beam elico model 2597
I have compare C2H2-air and C2H2-N2O flame AAS on determination calcium. Both use same range of std to plot calibration curve. (2-6ppm) When i measure the sample with phosphate, KCl and LaCl, C2H2-N2O flame give false positive result, around 0.5ppm. When i measure the sample with phosphste, KCl and EDTA. C2H2-N2O flame also give 0.5ppm false positive. But both above mentioned sample would not give false positive when measured by C2H2-air flame. What is the reason? 1067
Give me details about dissolution , with name ? 352
1)What's the meaning of Absorption,give a example. 2)What's the meaning of Adsorption,give a example. 2)what is the difference between Absorption and Adsorption. 330
 429
HOW DO U DIFFERENTATE PRIMARY & SECONDERY AMINES BY INFRA RED SPECTROSCOPY? 323
Why we have to take 42gm of sodium hydroxide instead of 40gm for preparation of 1M Sodium hydroxide as per Pharmacopia? Whether it means the formula for calculating molarity was wrong?  42
Sulphated Ash incresed it will effect on product yield? 534
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