I usually use the protocol of Hodges et al. (1999) in Planta 207:604-611 and in my opinion is the best as well as easy to perform .
It is based on TBA wavelenght absorbance spectrofotometrically determined. Furthermore, differently from other protocols, it allows to remove the interfererence of coloured pigments (anthocyanins, ecc...). For these reasons I strongly suggest to use this protocol.
we use same protocol as Xin Zhang with little modifications for our invivo work. if you need any suggestion for your animal related studies, share with us.