Hi,
Ban nen cho biet cu the la tach tu loai cay nao? Neu da chay GC-MS thi xem ham luong chat can tach trong do la bao nhieu. Sau do dung cac phung phap thong thuong thu xem. Nhu sac ky cot, HPLC chang han, sau do vua doc vua lam. Chu cho ai lam roi chi cho minh thi lam sao ma tien bo duoc.
Than ai
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