pH Buffer Solution Powder Sachets - pH 6.86 - pH 4.00 - pH 9.18

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Buffer solution powder sachets to calibrate pH meters. Used for calibrating pH meters. Each buffer solution powder makes up a 250ml buffer solution. These are essential for pH mete rs that get a lot of use or haven't been used for a while. Over time pH meters will become less accurate, recalibrating ensures the meter is accurate again. It's crucial to store your pH probe in the relevant pH storage solution when not in use. Each sachet makes 250mL of storage solution. Includes: - pH 6.86 Buffer Powder Sachet- pH 4.00 Buffer Powder Sachet- pH 9.18 Buffer Powder Sachet Note: Make sure to use deionised water to make up your buffer solutions and stir until powder is completely dissolved. Once your solution has been made use within 3 months. Over time you will get pH drift from CO2 dissolving into the buffer liquid. We strongly recommend you to calibrate your pH meter before every use. Show more