Yes. Purebred Samoyeds are relatively large and have pure white hair all over their bodies. If the Samoyed breed is impure, it may be that the size is small or the hair is milky white or light yellow. Secondly, purebred Samoyeds have erect ears. If the dog’s ears are flat, it may not be a purebred.
In addition, a purebred Samoyed always has a smile on his face. If the dog usually looks If it doesn't look smiling, it may be impure or not in good condition. Finally, the hair of a purebred Samoyed is very thick and fluffy. If the dog has less hair, it may be impure.