Dear Sudha Madhuri
Nice to see initiative on such kind of thread... First time when I gone through the posting I was not even aware about what is RoHS... Then further searching on goggle I came to know that it is "Restriction of Hazardous Substances Directive"... Thanks for educating me...
Attaching one presentation got from net itself on the different testing methods for RoHS... I don't know how much it is relevant and helpful to you... Have a look and let me know your feedback...
Hopefully our senior members come with more technical inputs on this topic...