Attentions: During the Operation, do please care for the followings:
　　1. Soon after the sampling, turn the tube 180°upside down,shaking and mixing 5-6 times.
　　2. Sampie the dosage as required in order to avoiding the inabiIity of the determination of the calcium due to the relative higher content of the heparin.
　　3. Heparin Anti-coagulation Blood sample should be used within 6 hours after sampling, otherwise, the blood will coagulate again..