hi! i have some strange by-product, intermediate, or something... i prepared inorganic complex, and it is contaminated ith something (have problems with purification), when i measure platinum NMR, i can observe signal of my product (which should be yellow), but it is yellowish and white (or white-beige). How could i determine, what is inside, beside my product? could Electrospray measurement help me (ESI-MS)? as far as i know, it can tell you if you have some desired compound structure, but what if it is a mixture? is there any technique to analise what is my product?