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Replenish your HI97721 iron-testing workflow. Genuine Hanna pre-measured reagents provide a choice of 100 or 300 high range tests with packet-level lot and expiration traceability.
Compatible HI97721 instrument; choose meter-only or kit where offered.
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Choose HI93721-01 for 100 tests or HI93721-03 for 300 tests. Both replenish the same iron high range method on the HI97721 photometer, making it straightforward to match your reagent order to your sample workload. These are reagent packs, not a meter kit.
Factory-measured powder doses reduce preparation steps. Hanna uses high-purity chemicals and marks the packets with a lot number and expiration date, helping you keep routine water-testing records tied to the reagent lot used.
The phenanthroline chemistry produces an orange color whose intensity is measured by a compatible photometer. The reagent combines reducing and complexing functions; Hanna notes that it converts all but the most resistant iron forms to the ferrous, soluble state. The HI97721 method reports iron from 0.00 to 5.00 mg/L (ppm). The HI97721 method is an adaptation of Standard Methods for the Examination of Water and Wastewater, 23rd Edition, 3500-Fe B, Phenanthroline Method.
For the HI97721, zero the meter with 10 mL of unreacted sample. Add one packet of HI93721-0 Iron HR reagent, close the cuvette and shake gently until completely dissolved. Use the three-minute reaction countdown before reading. Follow the complete HI97721 manual for the sequence, interferences and temperature guidance.
Keep the cuvette exterior clean and dry, avoid bubbles and respect the specified reaction timing. Review the linked Safety Data Sheets before handling and arrange appropriate disposal of reagents and reacted samples.
HI93721-01 supplies enough reagent for 100 tests; HI93721-03 supplies enough for 300 tests. Each HI97721 test uses one packet. Choose a pack size that suits anticipated use before the expiration date on your supplied stock; the larger pack does not change the chemistry or measurement range. The photometer, cuvettes and CAL Check standards are not included.
Both HI93721-01 and HI93721-03 are explicitly listed in the HI97721 iron high range photometer manual. Use the full procedure for your exact instrument; this page does not claim compatibility with other iron Checkers.
HI93721-01 provides enough reagent for 100 tests and HI93721-03 provides enough for 300 tests. Both use the same HI93721-0 iron high range reagent.
The HI97721 method covers 0.00 to 5.00 mg/L (ppm) as iron. A larger reagent pack increases test count, not the measuring range.
The HI97721 procedure uses one HI93721-0 powder packet with 10 mL of sample. Zero with unreacted sample before adding reagent.
After adding the packet and gently shaking until dissolved, follow the three-minute countdown in the HI97721 procedure before the measurement.
No. This listing supplies replacement reagents only. The compatible instrument, cuvettes, caps and calibration-check standards are separate products.
Read the lot number and expiration date on the supplied reagent packaging. Manufacturer photographs are illustrative; their printed dates do not identify the lot or expiration date you will receive.
Read the linked Safety Data Sheets and the exact instrument procedure before testing. Use appropriate protection, keep cuvettes clean and dry outside, avoid bubbles and arrange suitable disposal of reagents and reacted samples.
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