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 Categories >> Sciences >> Chemistry
 
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Question Asked @ Answers Views     Select
What is the meaning of 624 in DB-624 Capillary column used in GC?    0  15
Hello Dear all; I have a technical question related to analytical Chemistry, I have a sample of (40% w/w) Ferric Chloride solution (for water treatment purposes which consist a little portions of Ferrous Chloride and Hydrochloric acid. I need to know the methods to determine the percentages of each Ferrous Chloride and Chloride acid. Also I want to make sure that this solution is truly (40% w/w). So ANY CLUE !!! Thanks in advance.    0  12
what is difference b/w spectroscopy, Spectrometry and Spectrophotometry ?    0  26
How to Calibrate NMR instrument ?    0  14
What are the inorganic material eliminated in Sulphated Ash    0  15
whenever kf titration is done that time one result is high and second one lower  results what to do.    0  22
why we use 254nm for caffeine analysis as it having maxima at different wavelength?    0  17
why we not use caffeine at 205nm for hplc calibration?    0  17
What is chiral and why this performing in HPLC    3  49
What is the difference between kf  and LOD    3  56
What is the reason of RT change in new column v/s old column in HPLC    1  60
What is the reason for negative peak in HPLC while using UV detector.    1  51
Why we compare unequal concentrated solutions in heavy metals test. For example comparing the test solution with 1 ppm lead standard and telling it's less than 20ppm?    1  53
If mass balance is not passing in forced degradation in method validation that method is suitable or not?    0  26
what are stereomers? how are they classified?    0  23
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Un-Answered Questions
 
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What is the formula to determine the concentration of M of a solution given the % transmittance? Use %T = 43.7 as an example. 348
process of Diclofenac sodium,IP. 145
What is a proteic unit? 455
In testing of Cement the formula for water requirement for setting time is as below- Water required for setting time = NC x 0.85 The question is that what is the logic of 0.85 in this formula?? 374
Practically why we get negative absorption in UV SPECTROPHOTOMETER when the time of cleaning sample analysis. is negative absorption in Uv valid or not? 142
Do you know what Trace metal clean technique is?describe that technique? 1654
Which std. used for standrdisation of ZnSO4? 181
WHAT IS THE DIFFERENCE BETWEEN SPECIFIED IMPURITY AND IDENTIFIED IMPURITY 159
give me method of calculating co relation of coefficient for HPLC,SOR & ANY OTHER 298
How you start the method development of unknown compound. 56
In HPLC (Waters) software Empower1,2 &3 what is the updation for each version 139
How do you explain the different solvent power of water and other organic solvent? 309
In performance Check of GC Why Hexadecane Peak is Considered  54
What should be the level/ Percentage of Arsenic in Arsenic free zinc. 223
cefoperozone and sulbactam inj. hplc test method 395
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