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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

Iron Reagent Set for Wine - HI83741-20


The HI83741-20 are reagents for the colorimetric determination of iron in wine samples. There are enough reagents for 20 tests to be used with Hanna’s compatible HI83741 portable photometer. 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 bottle and 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 HI83741-20 are high quality reagents that are pre-measured, allowing for users to achieve fast and accurate colorimetric measurements. These reagents follow a method in which the reaction between iron and reagents causes a purple tint in the sample. By simply following the procedure and adding the correct amount of wine solvent 1, and 1 packet each of HI83741A-0 and HI83741B-0 from the reagent set to the sample, the reaction between iron and reagents causes a purple tint in the sample. The intensity of color is determined by the compatible HI83741 photometer and the concentration will be displayed. The results will be displayed in ppm (mg/L) of iron. These reagents are designed to be used with samples that have an expected range of 0.0 to 15.0 ppm iron.

Trace iron concentrations in wine are beneficial for enzyme activity, as stabilizer, and as a functional component for proteins. At higher concentrations it alters the redox potential, in favouring oxidation, affecting sensory characteristics and participating in the formation of complexes with tannin and phosphates resulting in instabilities (casse). The most common iron casse is ‘white casse’ (iron phosphate), it is initially seen as milky white cloud and later as a precipitate. The ‘blue casse’ (ferric tannate) that occurs less often can be observed in white wines for example after tannic acid additions.Most of the iron present in wine is present in the ferrous Fe(II) state. The ratio of the Fe(II)/Fe(III) depends on the oxidation state of the wine. If Fe(III) is formed, it can bind with phosphates that are normally present in wine.Since iron strongly binds with several organic acids, some wine makers add citric acid to the wine to complex free iron if the concentration exceeds 5 mg/L. If no contamination occurs the normal iron concentrations in must range from 1 to 5 ppm. The most important source of iron in wine is contact with iron containing alloys during processing. During fermentation a part of the iron is absorbed by yeast and thus removed from the wine during filtration.

Casse formation depends on: iron concentration, pH, ORP, phosphate, content and the type of wine.

white casse formation white casse inhibition
iron concentration > 7 ppm iron concentration < 5 ppm
high redox potential (Fe3+ present) clarification with bentonite
pH 2.9-3.6 citric acid addition 12-24 g/hL
SKU HI83741-20
Name Iron Reagent Set for Wine - HI83741-20
Package Packets and bottle
Quantity 20 tests
Method The reaction between Iron and the reagents causes a purple tint in the sample.

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 on orders over $100, typically arriving within 5 to 7 days. Delivery times may vary depending on the courier service and the recipient's location. Free shipping is not available with other offers or discounts.

Same-day despatch: Place your order before 1 PM Monday to Friday for same-day despatch. Delivery times may vary depending on the courier service and the recipient's location. Subject to stock availability.

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

Additional information

Weight 0.41 kg