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hii, i'm had a sample of 1L that gone through extraction & evaporation. i used 0.5ml of methanol for reconstitution before injecting the sample to HPLC. i made a calibration curve using a standard solution but now i'm confused about how to display the concentration i got from the sample. for ex. i got 0.2ug/ml how i'm gonna explane this is for the 1L ? please help .. i'll really appreciate it thanks
1 4161Dear Sir, This is Thirunavukkarasu am working in Ordain Health Care AR&D, Am Having one problem While doing method development my question Metadoxine and Pyridoxine same chemical nature and structural activity i tried lot of methods but Analyte eluted same Retantion time i cant separate both peaks. solubility, pH both are same only only difference melting point metadoxine 210 C Pyridoxine 102 C please do the help needful for me
5 9602some product having water content method with pyridine and ethylene glycol mixture instead of methanol? how they are selecting and methanol is not suitable solvent how ?
2620When ever we perform system suitability,inject the corresponding standard 6 times why? is thair any reson
4 10604Ratio of Water and Acetonitrile(diluent) is not recommended to use in cleaning method validation,why?
29261)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.
2846
Acid value definition is number milligrams of koh required to nuetralise the acid present in one gram oil & fats but why not use naoh for nuetralisation?
in which situation require to change rs specification?
what is difference between UV - VISIBLE MODEL NO like 1600,1601,1700 etc ? plz explain me
Differentiate electroplating and electro less plating? : Electrochemistry Corrosion
in api coa analytical method given as Ph Europe which api used in formulation in this api coa method given Ph Europe so for Analytical methic for finished product we require to refer Ph Europe monograph ok n.a.? So any extra impurities which is given in USP monograph of api or finished product need not require to monitor on above case n.a.? but how require to do specificity?
Give the IUPAC name for [Co(NH3)5SO4]Cl
about method developement in hplc
if tech transfer fails whay require to do?
A ha tc is actual defination of retention time?
Which parameter require to do for analytical method equivalency?
what are the checklist need to maintain in API manufacturing area as per USP requirements.......?
what is NIR wave length
What does it mean for a molecule or a ligand to be "chiral"? What properties does chirality impart to a molecule? : Polymer Chemistry
Explain the process of obtaining Protactinium from its primary sources and its purification methods.
how to prepare the 0.001M tio2
