Quality control sample

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  Quality Control Sample Of Zinc In Tea | 124.4mg/kg | 40g | Environmental Monitoring Standard Material

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  Quality control sample of zinc in tea with concentration 124.4mg/kg, volume 40g (cas: 7440-66-6) ideal for chemical titration and analysis ensuring high precision and reliable results

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  Quality Control Sample Of Zinc In Wheat Flour | 20-30mg/kg | 30g/bottle | Environmental Monitoring Standard Material

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  Quality control sample of zinc in wheat flour with concentration 20-30mg/kg, volume 30g/bottle (cas: 7440-66-6) ideal for chemical titration and analysis ensuring high precision and reliable results