HI4010-30 is a set of premium quality solutions for the fluoride ion selective electrode. The kit contains four 500 mL bottles each of 1 ppm (mg/L) fluoride standard with TISAB II, 10 ppm (mg/L) fluoride standard with TISAB II, and TISAB II ionic strength adjuster.Hanna ISE solutions have the lot number and expiration date clearly marked on the label. Bottles are air tight with a tamper-proof seal to ensure the quality of the standard solution. Hannas line of standards have been specially formulated to have an expiration of 5 years from the date of manufacture for an unopened bottle.

• Lot number and expiration date printed on each label