1) "使头发根部没入溶剂1mm，如此4~8个小时，完成"
It should be different from the hair of a poisoned person. Where do you get the idea of 4-8 hours?
2) "只需将血液样本按医院常规方式加热至室温"
The blood sample is not collected from a living person. There is no way to "加热至室温". The sample might be dry right after collection.
