Are emergency WHO international standards the same as international standards? What is the difference? Does WHO have a second reference? Can you give an example?

The landlord can consult the laboratory teacher of Hefei Green Regent Medical Technology Co., Ltd., which is more professional. It is related to China National Laboratory Reference Materials (China Pharmacopoeia), usp Reference Materials (United States Pharmacopoeia), EP Reference Materials (European Pharmacopoeia), (WHO) World Health Organization Drug Reference Materials, Drug Impurity Reference Materials, NIST (American National Bureau of Standards), Irrm (European Bureau of Standards) Metal Analysis Reference Materials, Environmental Monitoring Reference Materials and ICP Reference Materials. At the same time, the company mainly represents Mitsubishi Chemical Company of Japan, USP Standard, YMC Company of Japan, ChromTech(AGP Chiral Column) of Britain, TOSOH Company of Japan, NACALAI TESQUE Company of Japan, DAICEL Company of Japan, SCAS Company of Japan, MEICK Company of Germany and SEPAX Technology Company of the United States. Waters, agilent, shimadzu, varian, thermo Fisher Scientific, whatman (wortmann MN, Kromacil, imported chromatographic instruments, other laboratory instruments/equipment/laboratory consumables, and chromatographic column consumables of well-known enterprises such as Park Jung-soo. ...

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