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 Categories >> Sciences >> Chemistry >> Analytical Chemistry       
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  Question  Asked @ Answers Views     select
 
WHY POTASSIUM DICROMATE USING IN UV CALIBRATION Apotex   1  40
what is difirence b/w ROI&ROE Pfizer  0  57
what is the difference between heavy metals and sulphated ash Aurobindo  0  96
Which column is more polar, C8 or C18? Laurus   2  397
what parameters we will consider while developing a HPLC method and how we confirm our HPLC method is valid? Laurus  0  72
How we will choose pH of a mobile phase if analyte pKa value is 4 Laurus  0  56
I want analyze my compound at 325 nm so which standard shall i use to calibrate my HPLC system? How i can assure my hplc detector is suitable or not? AMRI  1  428
how do you established the RRF for unknown impurity Square-Pharma  2  428
WHAT IS THE DIFFERENCE BETWEEN SPECIFIED IMPURITY AND IDENTIFIED IMPURITY  0  107
WHAT IS THE DIFFERENCE BETWEEN SPECIFIED IMPURITY AND IDENTIFIED IMPURITY Glenmark  1  179
if the purity is 99.9%,is need to do assay? Reddy-Labs  1  640
Why we more noise in PDA detector compared to UV detector? Aurobindo  1  555
What is Endcapped Hplc column  1  227
Any molecule is filing for ANDA purpose, what are the dissolution requirements / specifications needed ? Ipca  1  256
In HPLC when we use Isocratic method, Gradient method in hplc? Pharmaceutical  2  736
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Un-Answered Questions
 
 Question Views Asked at   Select
 
WHICH STANDARD WE USE IN SILICA ANALYSIS IN SILICA-GEL METHOD FOR SOLID SAMPLE 110  
why we conclude the area% for the chromatographic purity? 977 Amneal-Pharmaceuticals
how to select short coloum and long coloumn for new molecule 109  
Nitrogen test is used for which chromatography? 105 laurus
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 3.3 363  
How can I develope method of dissolution by HPLC OR UV 147  
WHAT IS THE DIFFERENCE BETWEEN SPECIFIED IMPURITY AND IDENTIFIED IMPURITY 107  
why we should take dst factor for below 1%moisture samples 219  
What is the formula to determine the concentration of M of a solution given the % transmittance? Use %T = 43.7 as an example. 331  
In HPLC when we use Isocratic method, Gradient method in hplc? 736 Pharmaceutical
In case of dissolution test, if there is variation within 6 individual units however the batch is complying as per S1 criteria, is it necessary to do investigation for the same? What should be the criteria for such variation? 197  
How long we can use hygroscopic reference standard in terms of water absorb.I mean in line with respective monograph's specification or more than that? 186  
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