Mini-Titrator for Measuring Titratable Acidity in Wine - IC-HI84502

The HI84502 is a simple, fast, and affordable automatic mini titrator designed for testing total acidity levels in wine. Based on an acid-base titration method, this mini titrator uses an optimized preprogrammed method of analysis with a powerful algorithm that determines the completion of the titration reaction by the use of a specialized wine pH electrode.

Analysis for titratable acidity with the HI84502 is not selective for acids of similar strength. In this method, a base of known concentration is used to understand the overall acid content of a sample and express it as the main acid present in wine, tartaric acid.

The HI84502 incorporates a precision piston style dosing pump that adjusts the volume of dosing dynamically based on the voltage changed. This dosing system reduces the amount of time required for the titration while providing for a highly accurate determination of the amount of titrant used.

This mini titrator is supplied complete with all the materials necessary to perform low and high range measurements of total acidity. All chemicals are premixed and prepackaged including standardized titrants, reagents and pump calibration solution. There is no need for volumetric glassware or analytical balances.

Features:

- Application-Specific pH Electrode: The HI84502 is supplied with the HI1048B glass body pH electrode featuring CPS technology to prevent the clogging of the reference junction. Conventional electrodes may clog quickly in biological samples that have a high solids content such as wine must. By design, the HI1048B pH electrode utilizes a polytetrafluoroethylene (PTFE) sleeve junction which 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 HI84502 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 600 rpm, regardless of the viscosity of the solution being titrated.

The HI84502 is supplied with HI1048B pH electrode, HI7662-T temperature probe, HI7082 electrode fill solution (30 mL), HI84502-50 (230 mL) titration solution, HI84502-55 pump calibration standard (120 mL), 100 mL beakers (2), dosing pump valve, 2000 L automatic pipette with plastic tips (2), 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, cleaning solution sachets for wine stains (2), 12 VDC adapter and instruction manual.

Measurement specifications:

- pH Range: -2.0 to 16.0 pH; -2.00 to 16.00 pH
- pH Resolution: 0.1 pH/0.01 pH
- pH Accuracy: +/- 0.01 pH (at 25 C/77 F)
- pH Calibration: one, two, or three-point calibration, four available buffers (4.01, 7.01, 8.20, 10.01)
- pH Temperature Compensation: manual or automatic
- pH-mV Range: -2000.0 to 2000.0 mV
- pH-mV Resolution: 0.1 mV
- pH-mV Accuracy: +/- 1.0 mV (at 25 C/77 F)
- Temperature Range: -20.0 to 120.0 C; -4.0 to 248.0 F; 253.2 to 393.2 K
- Temperature Resolution: 0.1 C; 0.1 F; 0.1K
- Temperature Accuracy: +/- 0.4 C; +/- 0.8 F; +/- 0.4 K (at 25 C/77 F), without probe error

Titration specifications:

- Titration Range: Low Range: 0.1 to 5.0 g/L of tartaric acid; High Range: 4.0 to 25.0 g/L of tartaric acid
- Titration Resolution: 0.1 g/L (ppt)
- Titration Accuracy: 3% of reading or +/-0.1 g/L, whichever is greater (at 25 C/77 F)
- Titration Method: acid base titration
- Titration Principle: endpoint titration: 7.00 pH or 8.20 pH
- Titration Pump Speed: 10 mL/min
- Titration Stirring Speed: 600 rpm
- Sample Size: Low Range: 10 mL; High Range: 2 mL

General specifications:

- pH Electrode: HI1048B glass body pH electrode with BNC connector and 1 m (3.3) cable (included)
- Temperature Probe: HI7662-T stainless steel temperature probe with 1 m (3.3) cable (included)
- Logging Type: Log-on-demand
- Logging Memory: up to 400 ( 200 titrations, 200 pH/mV readings)
- Connectivity: 1 USB port for data storage and export to a PC
- Built-in Magnetic Stirrer: Built-in magnetic stirrer at 600 rpm
- Power Supply: 12 VDC adapter (included)
- Environment: 0 to 50 C (32 to 122 F); RH max 95% non-condensing
- Dimensions: 235 x 200 x 150 mm (9.2 x 7.9 x 5.9)
- Weight: 1.9 kg (67.0 oz.)