Minititrator for the analysis of sulfur dioxide
Designed for the analysis of free or total sulfur dioxide (SO₂) in wine
Automatic, simple, and fast mini titrator designed for the analysis of free or total sulfur dioxide (SO₂) in wine.
Based on the Ripper method, this mini titrator uses a pre-programmed analysis method with an algorithm that determines the end point of the titration reaction through the use of an ORP electrode.
It features a highly accurate piston dosing pump that adjusts the volume of titrant according to the change in potential.
This dosing system reduces the time required for titration while providing a precise determination of the amount of titrant used.
This mini titrator comes complete with all necessary accessories and reagents for performing both free and total sulfur dioxide measurements in wine.
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Piston pump for precise dynamic dosing
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Supplied with ORP electrode featuring CPS™ technology
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Pre-dosed titrant and reagents included
The Importance of Monitoring Sulfur Dioxide
Wine producers add sulfur dioxide (SO₂) to wine as an antioxidant and to inhibit the growth of bacteria and yeasts.
When SO₂ is added to wine, part of it binds immediately. The remaining portion is called free SO₂ and is responsible for protecting the wine.
Together, these two portions are referred to as total SO₂. The ratio between the amount of SO₂ added and the amount of free SO₂ is complex and depends on the total SO₂ in the wine and on the binding capacity of certain compounds (such as sugars, aldehydes, keto acids, quinones, anthocyanins).
This ratio varies from wine to wine. Free SO₂ depends on the amount added, the pre-existing amount, and the portion that binds immediately. Free SO₂ exists in two forms:
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Bisulfite (HSO₃⁻) – the predominant but relatively ineffective form
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Molecular SO₂ – the minor form, which is responsible for the actual protection of the wine.
The amount of molecular SO₂ present in wine depends on the free SO₂ level and the pH. Typically, 0.8 ppm of molecular SO₂ provides adequate protection against oxidation and bacterial growth.
To achieve this level in a wine with a pH of 3.2, 22 ppm of free SO₂ is needed. If the pH is 3.5, the amount of free SO₂ required doubles to 44 ppm. titration endpoint.
It offers a reliable, accurate, and fast measurement method.
The mini titrator dispenses the titrant, detects the endpoint, and automatically performs all necessary calculations in less time than a manual titration.
Main Features:
Simple Interface
The HI84500 features an intuitive interface with clearly defined keys and a large display for easy navigation. The instrument includes a built-in tutorial mode that, when enabled, guides the user step by step through the titration process. A dedicated HELP key is always accessible, offering specific information during calibration and titration.
Error Messages
Users are alerted in the event of an error, such as when titration exceeds the maximum titrant volume.
Graph Mode
This mini titrator displays detailed data during titration, including a real-time titration curve graph.
Manual Data Logging
The HI84500 allows the logging of up to 400 samples: 200 titration results and 200 ORP/mV measurements. Data can be stored and exported to a USB flash drive or a PC via USB connection.
Simple and Fast Analysis Procedure
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Sample preparation: Add 5 mL of reagent and 1 sachet to 50 mL of wine
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Press START to begin the titration
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Wait for the result to appear on the display
Features
Piston Dosing Pump
At the heart of the instrument is a piston-driven dosing system. This design ensures extremely precise control of each dose, with the dispensed volume accurately determined. The piston burette is dynamically controlled so that the amount of titrant delivered is automatically adjusted based on the previous dose. This dosing method speeds up the titration process by delivering more titrant at the beginning and very small amounts near the endpoint.
Automatic Stirrer
The built-in stirrer is automatically maintained at a constant speed of 700 rpm, regardless of the solution’s viscosity.
Application-Specific ORP Electrode
The titrator comes with an ORP electrode equipped with CPS™ (Clogging Prevention System) technology. Conventional electrodes can easily become clogged in samples like wine, which contain high levels of suspended solids. The ORP electrode features a ground glass/PTFE sleeve junction, ensuring proper electrolyte flow and preventing buildup. The hydrophobic properties of PTFE repel moisture and coatings, helping to maintain performance over time.
Order Information
The instrument (230V) is supplied with:
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ORP electrode
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Electrode fill solution (30 mL)
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Low range titrant (230 mL)
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High range titrant (230 mL)
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Calibration standard solution (120 mL)
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Acid reagent (230 mL)
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Alkaline reagent (120 mL)
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Stabilizer reagent (50 sachets)
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100 mL beakers (2)
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20 mL beakers (2)
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Scissors
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Dosing pump valve
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5 mL syringe
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1 mL plastic pipette
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Tubing set (suction tube with titrant bottle cap and dosing tube)
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Magnetic stir bar
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Cleaning solution sachets for wine deposits (2)
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Cleaning solution sachets for wine stains (2)
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12 VDC adapter
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Instruction manual