We use a 3d mixer instead of using a u shape mixer. And the way to do it is mix a bit by bit. Say you got 40mcg for Clen. And u have 3 kg of filler that will mix with the raw. We first mix 500g with the active first snd spin the 3d mixers. And then after 5 mins we put another 500g. So forth so on. This way it’s mix balanced. Lastly we have our own hplc and we bought standards from Europe to compare our results. We usually make big batches and we run hplc for each big batch.