Hanna Instruments Australia
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Sales: (03) 9769 0666   |    Mon to Fri: 8:30am – 5:00pm
Hanna Instruments Australia
Sales: (03) 9769 0666   |    Mon to Fri: 8:30am – 5:00pm

Alkalinity Test Kit Replacement Reagents (110 tests) - HI3811-100

$90.55

The HI3811-100 are reagents for the determination of alkalinity by titration with the alkalinity chemical test kit. There are enough reagents for approximately 110 tests to be used with Hanna’s test kit. These high quality reagents are manufactured in our state-of-the-art facility and are clearly marked with the lot number and expiration date on each packet for traceability.

  • Pre-made reagents for ease of use
  • Prepared with high-purity chemicals
  • Marked with expiration date and lot number for traceability

The HI3811-100 are high-quality reagents that are pre-measured, allowing  users to achieve fast and accurate alkalinity measurements with the chemical test kit. These reagents follow the phenolphthalein/bromophenol blue method to determine phenolphthalein alkalinity/total alkalinity concentration.

For determination of phenolphthalein alkalinity, the dilute hydrochloric acid titrant neutralizes the sample to the pH endpoint near pH 8.3. With addition of phenolphthalein indicator, the solution turns pink to visually indicate it is near the pH endpoint. For total alkalinity determination, dilute hydrochloric acid is also used as the titrant. With addition of bromophenol blue indicator, the solution turns yellow to blue/green as it reaches the pH endpoint near pH 4.5. The number of milliliters of titrant used to reach the appropriate endpoint will determine the alkalinity as mg/L CaCO3. These reagents are designed to be used with samples that have an expected alkalinity range of 0 to 100 mg/L and 0 to 300 mg/L CaCO3.

SKU HI3811-100
Name Alkalinity Test Kit Replacement Reagents (110 tests) – HI3811-100
Package bottles
Quantity 110 tests
Method phenolphthalein / bromophenol blue

Alkalinity Test Kit Replacement Reagents (110 tests) – HI3811-100

All prices are inclusive of GST and not all items are stock items, if you require an immediate solution please send an email to sales@hannainst.com.au or call us on (03) 9769 0666.


Free standard delivery:

We offer free delivery within Australia, typically arriving within 5 to 7 days. Delivery times may vary depending on the courier service and the recipient’s location.


Same-day express delivery:

Place your order before 1 PM Monday to Friday for the same-day express shipping. Delivery times may vary depending on the courier service and the recipient’s location.

Please note that we do not offer shipping to PO Box addresses.

All prices are inclusive of GST and not all items are stock items, if you require an immediate solution please send an email to sales@hannainst.com.au or call us on (03) 9769 0666.

Please note that we do not offer shipping to PO Box addresses.