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Quality control substances for cadmium, mercury, arsenic, lead, chromium, nickel, cobalt, vanadium, antimony, selenium and thallium in water-soluble fertilizers (GB/T23349-2020), (GB/T39229-2020/ISO17318:2015), (NY/T1978-2022), (GB/T39356-2020), (NY/T1110-2010)
