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IN pH CALIBRATION,CALIBRATION IS DONE FOR pH METER OR ELECTRODE?HOW WILL YOU JUDGE THAT THE METER TO BE CALIBRATED WITH 4,7,9.2 BUFFERS?EXPLAIN TEMPERATURE EFFECTS ON pH.
1 11049AT WHAT CONDITIONS WILL YOU ANALYSE A SAMPLE,WHICH ARE PRESERVED AT OTHER THAN THE AMBIENT CONDITIONS?(ie COLD STORAGE SAMPLES BELOW 20* CENTIGRADE?
2054In standard weight box used for calibration of analytical balance there are two numbers (Qty) of 20mg, 200mg,2.oGM weights. Why?
2 16038How to calculate signal to noise ratio by this formula 2H/h where h from where and how to measure
2 10592How do we fix the sample concentaryion in hplc method development. what is the basis?Thanks in advance
4 20958Suppose we prepared pH buffer solution in lab.and calibrate against NIST solution, and same shall going to used upto 30 days. is it possible to stable pH and apperance ? suggest ?
1 6067Post New Analytical Chemistry Questions
How do we fix the sample concentaryion in hplc method development. What is the basis?
How to establish relative response factor for hplc. Why it is required?
what is the structure of DOWEX-50
Why do we use KMnO4 in the test of control of obsorbance ? and why do we take specific quantity i.e 57-63mg?
can we use the same detector in HPLC as well GC and what could be the differences we can find in the final chromato graph in any aspects?
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?
Basic principle of ESI?
why we should take dst factor for below 1%moisture samples
how you fix the limits of impurities?
we are performed SOR for a particular product the limit is -6 to -10.We face particular bathes it is not meeting the specification.we performed diffrent instrument diffrent analyst we are getting diffrent diffrent results.solvent is dimethyl sulfoxide what could be the reasion
what is impurity profile. how to interpret this impurity profile to a drug product or drug substance.
If we do accuracy at same concentration at which linearity planned,what is the need to do linearity separately?
inhouse product is in capsule form in combination and RLD is in tablet form then can we proceed for multimedia CDP? in inhouse capsule product disso is paddle with sinker in release media is there then RLD product in tablet form then with same as paddle with sinker we can proceed n.a.?
what is %labelled amount in content uniformity of dosage unit and its calculation?
for which product require to do content uniformity? what is limit of cu?
