From: Novel spectrophotometric method for determination of cinacalcet hydrochloride in its tablets via derivatization with 1,2-naphthoquinone-4-sulphonate
Variable
Studied range
Optimum
NQS concentration (%, w/v)
0.1 - 0.9
0.5
pH
6 - 10
8.5
Temperature (°C)
25 - 60
25
Time (min)
5 - 35
10
Diluting solvent
Differenta
Water
Measuring wavelength (nm)
400 - 600
490