The HI84500 can be used to test for free and total sulfur dioxide in all wines, including red, which are difficult to test using traditional methods due to the inability to see the distinctive color change that occurs at the endpoint. The HI84500 offers reliable, accurate, and fast wine analysis. This mini titrator dispenses the titrant, detects the endpoint, and performs all necessary calculations automatically in a fraction of the time as compared to a manual titration. As found in Triage for Basic Wine/Grape Lab by Richard Carey, "the mini-titrator by Hanna reduces the time for an individual analysis by 75%.in.

Winemakers add sulfur dioxide (SO₂) to wine in order to inhibit bacteria and wild yeast growth and to serve as an antioxidant to prevent browning. When SO₂ is added to wine, a portion of it becomes immediately bound while a remaining portion is unbound SO_2. The portion that is unbound is also called free SO₂ and it is responsible for protecting the wine. The bound and free SO₂ together are referred to as total SO2. The relationship between the amount of SO2 added and the amount of free SO₂ is complex, governed by the total amount of SO₂ in the wine and the ability of compounds (e.g. sugars, aldehydes, keto acids, quinones, anthocyanin) to bind to the SO₂. The exact relationship between free and bound SO₂ will vary from wine to wine.

The amount of free SO₂ depends on how much is added, how much was present before the addition, and how much was immediately bound. Free SO₂ exists in two forms. The first form, bisulfite (HSO₃^-), is the predominant form but is relatively ineffective. The second form, molecular SO₂, is the minor form and is responsible for protecting the wine. The amount of molecular SO₂ available in wine is dependent upon the amount of free SO₂ present and the pH. Typically 0.8 ppm of molecular SO₂ provides adequate protection against bacteria growth and oxidation. In order to obtain this value for a wine sample that has a pH of 3.2 you would need 22 ppm of free SO₂. If the pH was at 3.5 you would need double the amount of free SO₂, 44 ppm.

pH	3.0	3.1	3.2	3.3	3.4	3.5	3.6	3.7	3.8	3.9
Free SO2	14	18	22	28	35	44	55	69	87	109

Application-Specific ORP Electrode

The HI84500 is supplied with the HI3148B ORP electrode featuring CPS™ technology to prevent the clogging of the reference junction. Conventional electrodes may clog quickly in samples such as wine that have a high suspended solids content. By design, the HI3148B ORP electrode utilizes a ground glass/PTFE sleeve junction that controls a steady, predictable flow of electrolyte solution, keeping the junction open. The hydrophobic properties of PTFE repel wetness and coatings.

Piston Driven Dosing Pump

The heart of the HI84500 is the piston driven burette pump. This type of dosing system uses a motor in which each dose is very precisely controlled and the volume dispensed is accurately determined. The piston driven burette is controlled dynamically so that the volume of titrant being dosed is automatically adjusted based on a voltage response of the previous dose. This type of dosing speeds up the titration process by allowing for more titrant to be dosed at the start of the titration and then very small doses as the endpoint is reached.

Automatic Stirrer

The built-in stirrer is automatically maintained at a speed of 700 rpm, regardless of the viscosity of the solution being titrated.

Low Range	High Range
HI84500-50 Low Range Titrant (230 mL)	HI84500-51 High Range Titrant (230 mL)
HI84500-55 Calibration Standard (120 mL)	HI84500-55 Calibration Standard (120 mL)
HI84500-60 Acid Reagent (230 mL)	HI84500-60 Acid Reagent (230 mL)
HI84500-61 Alkaline Reagent (120 mL)	HI84500-61 Alkaline Reagent (120 mL)
HI84500-62 Stabilizer packets (100 pcs)	HI84500-62 Stabilizer packets (100 pcs)

On-Screen Features

Easy-to-Use Interface

The HI84500 has an intuitive user design with clearly defined keys and a large screen that is easy to navigate. The SO2 meter has a built-in tutorial mode that, when enabled, will walk the user step by step through the titration process. A dedicated HELP key is always available to allow access to content-specific information during both calibration and titration.

Procedure Warnings

Users are warned if there is an error in procedures such as the titration exceeded the maximum volume of titrant.

Graphic Mode

This mini titrator displays in-depth data during titration, including a real-time graph of the titration curve.

Log-on-Demand

The HI84500 allows for data logging of up to 400 samples: 200 titration results and 200 ORP/mV readings. Data can be stored and exported to a USB drive or a PC using the USB connection.

ORP Meter

In addition to being an automatic titrator, the HI84500 also can be used as an mV meter for direct ORP measurements.

Specification	Detail
sku	HI84500-01
Range	Low Range: 1.0 to 40.0 ppm of SO₂ High Range: 30 to 400 ppm of SO₂
Resolution	Low Range: 0.1 ppm High Range: 1 ppm
Accuracy (@25ºC/77ºF)	Low Range: 3% of reading or ±0.5 ppm @ 25 °C, whichever is greater High Range: 3% of reading or ±1 ppm @ 25 °C, whichever is greater
Sample Volume	50 mL
Methods	Ripper method
Principle	equivalence point redox titration
Pump Speed	10 mL/min
Stirring Speed	700 rpm
mV Range	-2000.0 to 2000.0 mV
mV Resolution	0.1 mV
mV Accuracy (@25ºC/77ºF)	±1.0 mV
Logging Data	up to 400 ( 200 titrations, 200 pH/mV readings)
Electrode	HI3148B glass body ORP electrode with BNC connector and 1 m (3.3') cable (included)
Environment	0 to 50°C (32 to 122°F) RH max 95% non-condensing
Power Supply	12 VDC adapter (included)
Dimensions	235 x 200 x 150 mm (9.2 x 7.9 x 5.9in.)
Weight	1.9 kg (67.0 oz.)
Ordering Information	HI84500-01 sulfur dioxide meter is supplied with HI3148B ORP electrode, HI7082 electrode fill solution (30 mL), HI84500-50 low range titrant (230 mL), HI84500-51 high range titrant (230 mL), HI84500-55 calibration standard (120 mL), HI84500-60 acid reagent (230 mL), HI84500-61 alkaline reagent (120 mL), and HI84500-62 stabilizer packets (50 packets), 100 mL beakers (2), 20 mL beakers (2), scissors, dosing pump valve, 5 mL syringe, 1 mL plastic pipette, tube set (aspiration tube with titrant bottle cap and dispensing tube with tip), stir bar, cleaning solution sachets for wine deposits (2), cleaning solution sachets for wine stains (2), 12 VDC adapter and instruction manual.
Warranty	2 years

Sulfur Dioxide Mini Titrator for Wine

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Sulfur Dioxide Mini Titrator for Wine

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