Verification Standards

Premixed, certified salt solutions for daily AquaLab performance verifications.

Select standards which cover the range of water activities you typically measure.

To ensure precise concentration and accurate water activity, use two fresh solutions each day or shift to bracket the water activity range you are testing.  You should use one standard below the range of your product and one above to ensure that the calibration of your instrument is precise.  Unopened vials have a one year shelf life.

The following standards are available:

• Distilled water (1.000  ± 0.003 a_w at 25º C)
• 0.5 M KCl (0.984  ± 0.003 a_w at 25º C)
• 2.33 NaCl (0.920 ± 0.003 a_w at 25º C)
• 6.0 M NaCl (0.760  ± 0.003 a_w at 25º C)
• 8.57 M LiCl (0.500  ± 0.003 a_w at 25º C)
• 13.41 M LiCl (0.250  ± 0.003 a_w at 25º C)

In boxes of 50 single use vials. Order online here.

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