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HI 3812 Hardness test kit (titration)  The hardness level as mg/L (ppm) calcium carbonate is determined by an EDTA (ethylene-diamine-tetraacetic acid) titration.

HI 3812 test kit comes with:

• 30 mL hardness buffer
• 10 mL calmagite indicator
• 120 mL EDTA solution
• 20 mL plastic beaker with cap
• 50 mL plastic beaker with cap
• 1 mL syringe with tip

Water hardness has traditionally been defined as the capacity of water to precipitate soap. The ionic species in the water causing the precipitation was later found to be primarily calcium and magnesium. In the present, therefore, water hardness is actually a quantitative measure of these ions in the water sample. It is also now known that certain other ion species, such as iron, zinc and manganese, contribute to the overall water hardness. The measure and subsequent control of water hardness is essential to prevent scaling and clogging in water pipes. and especially  saltwater chlorinator cells