Difference of heparin and EDTA tubes for blood collection

Even for blood collection, doctors can take different tubes for the same action. I know that there is difference of heparin and EDTA tubes from China medical equipment supplier for the blood collection. What’s the difference of the effect for the blood collection?

Some friends say that EDTA will serve as a better anticoagulant as compared to heparin and would be more useful in delayed blood sample analysis for DNA in forensics. For the saying from Wikipedia. It says that as Upendra said Heparin inhibits PCR reactions, we had practical experience, it was a hell to amplify the samples stored in heparin. EDTA from RNA-DNA tube wholesale in China is very good chelating agent it should be used in optimum concentrations. Benefit of using EDTA as anti coagulant , we can carry the samples at room temperature. Knowing details clear, we would get that we can treat our patients better with the accurate medical equipment.

Of course, it has the similar principle when we use high quality ESR tube for the patients.