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Order water hardness standards online for checking hardness measurement equipment and procedures. Online Reagents supplies nine values from 0 to 1000 ppm: 0, 0.5, 1, 20, 50, 100, 342, 500 and 1000 ppm. Choose the value required by your instrument or test method, then select the pack size and quantity; pricing, availability and delivery will be confirmed in your quotation. If you need help selecting a value, contacte con nuestro equipo.
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