Answer / anusha

ppm means parts per million solution...
ppm solution is prepared by dissolving 1mg in 1 litre solution i.e 1mg/1000ml
or
1ug/ml solution is also called as 1 ppm

Answer / rakesh

mass solute/mass solution*10000000=1ppb

Answer / rajesh

1% means 10000 ppm
1 ppm means 1000 ppb

Answer / devendra kumar

ppb means parts per billion.
mass of solute/mass of solution*10000000=ppb
ppm means parts per million.
mass of solute/mass of solution*1000000=ppm

Answer / vipul patel

PPM is a term used in chemistry to denote a very, very low
concentration of a solution. One gram in 1000 ml is 1000
ppm and one thousandth of a gram (0.001g) in 1000 ml is one
ppm.
dilute 1ml of 1ppm solution to 1000ml is 1ppb

Answer / kjjg

in unipune

Shall i use a same hplc column for two different products.?

3 Answers  

If mass balance is not passing in forced degradation in method validation that method is suitable or not?

1 Answers   Aurobindo, Dr Reddys, Reddy Labs, Wockhardt,

what is difference between drug products and drug substance?

5 Answers   DRL,

What is column in chromatography?

0 Answers   Chembond Chemicals,

what is concentration of oxygen in U.H.P. grade N2 cylinder

1 Answers  

How you can calculate pKa ?

6 Answers   Dr Reddys,

in which situation require to change rs specification?

0 Answers  

if peak get problamatic then what require to do?

0 Answers  

What is reaction takes place when water content analysis is done

2 Answers  

IF WE INCREASE FLOW RATE RT DECRESE.WHY

2 Answers  

Dear 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 Answers   Ordain Solutions,

What is the principle of hplc detectors like.. UV detector,flurosence detector, RID?

0 Answers   Cipla,