The answer depends on your sample matrix and the expected concentration!

The USP has a good titration procedure for Vitamin C raw material while HPLC is commonly used in complex drug products that have a low concentration.

Thanks a lot for your help.

I want for cherry tomato 

In that case see this article;

https://pp.bme.hu/ch/article/download/2681/1786

Thanks Prof Bruce 

Check the Waters, Agilent, and Phenomenex websites too!  They have good methods but may use an MS or PAD detectors (pulsed amperometric detector).

Thanks a lot Bruce Neagle