[akp85]

The procedure calls for analysis at a wavelength where the absorbance is a relative maximum (we recorded our absorbance values at the maximum wavelength for this solution which happened to be 455nm). Suppse there are one or more interfering species in a solution, which also absorb more or less strongly at this same wavelength. How could/should you deal with such a situation of overlapping absorbances?

So yes using spectrophotometric method, how do i avoid overlapping absorbances?

[tamim83]

You should find the wavelegnth of maximum absorbance for each substance in your solution. You can do this by making solutions of the interfering substances and measuring the absorbance over a vwavelegnth range.