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GB/T 45243-2025_Chinese: Determination of thiamine, riboflavin, pyridoxine, niacin, niacinamide and caffeine in health foods (Chinese: 保健食品中硫胺素、核黄素、吡哆醇、烟酸、烟酰胺和咖啡因的测定) Note/Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working-hours typically, ASAP English versions: GB/T 45243-2025
