Skip to content
Phenols Reagent Set for Wine – HI83742‑20 (20 Tests) Reagent Kit Hanna Instruments
Phenols Reagent Set for Wine – HI83742‑20 (20 Tests) Reagent Kit Hanna Instruments

Phenols Reagent Set for Wine – HI83742‑20 (20 Tests)

$99.99

    The HI83742‑20 Phenols Reagent Set provides 20 precise, traceable tests for measuring total phenols in wine using the Folin‑Ciocalteu method. Reagents are pre‑measured and labeled for lot and expiry—perfect for lab or production settings.

    • Standardized 20-test kit for HI83742 photometer

    • Measures total phenols in g/L GAE (0.00–5.00 range)

    • Lot and expiration labeling ensures traceability

See All Specs

aeroplane.png__PID:119d4b1a-2623-400c-8fa4-aec5b49a3bf0

Fast Delivery

Most items ship same day

protection.png__PID:4b1a2623-e00c-4fa4-aec5-b49a3bf05f92

Manufacturer Warranty

All products are covered by manufacturer warranty

technical-support.png__PID:e00c8fa4-aec5-449a-bbf0-5f923431936b

After-Sale Support

24/7 support

What's Included

download (70).webp__PID:7ab0a366-c50a-41ee-ae3a-ab9ed2dfc0ad

VR Headset

download (71).webp__PID:547ab0a3-66c5-4a41-aeae-3aab9ed2dfc0

2 Touch Controllers

download (72).webp__PID:dc547ab0-a366-450a-81ee-ae3aab9ed2df

Charging Cable

download (72).webp__PID:dc547ab0-a366-450a-81ee-ae3aab9ed2df

Power Adapter

download (72).webp__PID:dc547ab0-a366-450a-81ee-ae3aab9ed2df

Glasses Spacer

download (69).webp__PID:26576cae-f878-4c99-ab7c-894d76af129b

The HI83742-20 reagents are a set of pre-measured, high-quality chemicals designed for fast and accurate colorimetric measurements of total phenolic content. This test kit utilizes the classic Folin-Ciocalteu method, which relies on the oxidation of phenolic groups (R-OH) by a specific mixture of phosphotungstic acid ($H_3PW_{12}O_{40}$) and phosphomolybdic acid ($H_3PMo_{12}O_{40}$) to their quinoid form (R=O). This reaction causes a reduction of the Folin-Ciocalteu reagent, producing a vibrant blue color in the sample. The intensity of this blue color is directly proportional to the total phenolic content and is expressed as Gallic Acid Equivalents (GAE) in g/L. The results can also be converted to a Folin Index (FI) or Total Phenol Index by simply multiplying the GAE value by 25. These reagents are specifically formulated for samples with an expected phenol concentration range of 0.00 to 5.00 g/L.

Phenolic compounds are vital to a wine's character and stability for several reasons. They contribute significantly to the wine's color and can impart an astringent taste and pungent aroma. These compounds also serve as a source of oxygen reduction and can lead to browning substances over time. Wine contains a complex variety of phenolic compounds, making it difficult to differentiate between total and specific phenols using traditional analytical techniques. While advanced methods like High-Performance Liquid Chromatography (HPLC) have shown progress, the Folin-Ciocalteu reagent remains the most common and reliable method for analyzing total phenols. Other techniques, such as direct spectrophotometric determination, are less precise due to varying molar absorptivity and interference from non-phenolic substances that may be present.

    Shipping, Return, and Warranty Policy

    At Blue Tiger Scientific, we are proud to distribute authentic Hanna Instruments products. The following policies apply to all purchases made through our store.

    Shipping Policy

    • All orders are shipped via FedEx from Hanna Instruments' fulfillment center in Smithfield, Rhode Island.
    • FedEx Ground is the standard method; expedited options (2-Day, Overnight) are available for an additional cost.
    • Hanna Instruments only ships to residential or business addresses within the United States (no PO Boxes).
    • Orders placed after business hours, weekends, or holidays will ship the next business day, pending product and carrier availability.
    • Shipping timelines may vary depending on product availability, order size, and carrier logistics.
    • Blue Tiger Scientific and Hanna Instruments are not responsible for carrier delays, weather-related disruptions, or other unforeseen delivery issues once the order has shipped.

    Return Policy

    • All return requests must be coordinated directly with Blue Tiger Scientific before a product is sent back.
    • Products must have a Return Merchandise Authorization (RMA) number issued by Blue Tiger Scientific before being returned.
    • Products must be returned in new or like-new condition, with the original packaging and proof of purchase (such as an invoice or packing slip).
      Customers are responsible for return shipping costs unless otherwise stated.
    • Unauthorized returns (without an RMA) will be refused and returned at the customer's expense.
      Returns are subject to inspection and approval. Products not in acceptable condition may be denied credit.
    • Some products, such as custom-built, special order, and hazardous materials, may not be eligible for return.

    Warranty Policy

    • Hanna Instruments' products are covered by their Limited Warranty against defects in materials and workmanship under normal use.
    • All warranty claims and services are handled directly by Hanna Instruments.
    • Warranty periods vary by product. If unspecified, the standard warranty term is 18 months from the Hanna Instruments factory ship date.
    • If you experience an issue believed to be covered under warranty, please contact Hanna Instruments for guidance on how to submit your warranty request to Hanna Instruments.
    • Customers must follow Hanna Instruments' warranty submission process, including providing a claim number, product model and serial number, and a detailed description of the issue.
    • Hanna Instruments will determine whether products are repaired, replaced, or otherwise serviced under warranty.
    • Note: Warranty coverage does not apply to damage caused by misuse, accidents, unauthorized repairs, or improper storage and handling.

    Important Notes

    • Some Hanna Instruments products are custom-made or built to order. Shipping will occur once the product is ready.
    • In the event of backorders, you may request partial shipments.
    • Delays beyond our control (e.g., material shortages, import delays, or carrier issues) may occasionally occur.

Product Resources:

Manual Manual
Brochure Brochure

Copy of Technical Specifications

FeatureDetails
Viewing Head Siedentopf type trinocular head, inclined at 30°, Interpupillary adjustment 53mm to 75mm, graduated diopter on left eyetube (30mm I.D. eyetubes)
Eyepieces SWH10X Widefield high eyepoint eyepiece, Field No. 22, tube O.D. 30.0 mm
Nosepiece Quintuple
Quintuple LWD Planachromat Phase 10x, 20x
Condenser TC Condenser N.A. 0.30, W.D. 73.0mm
Stage180mm(X) x 245mm(Y) plain stage with replaceable glass insert with 45mm opening, Glass Stage plate insert
IlluminationKoehler without iris, with phase slider, 3W LED
WarrantyLIMITED LIFETIME WARRANTY

Questions about a product? Ask us here.

email us here: info@bluetigerscientific.com or live chat

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)