The HI84502U-01 is a simple, fast, and accurate automatic mini titrator designed for the determination of pH and titratable acidity in wine, juice, and must.
This mini titrator uses a optimized preprogrammed method and a specialized wine pH electrode to give a highly accurate determination of pH and titratable acidity.
Acids occur naturally as grapes grow and during the eventual fermentation process. Wines have lower levels of acid when there is a hot growing season or when the grapes come from warmer regions. In the proper proportion, acids are a desirable trait, giving the wine a distinct character. The three predominant acids in wine are tartaric, malic and citric. Tartaric acid is the principal acid in grapes and is a component that promotes a crisp flavor and graceful aging in wine. A moderate amount of a wine’s acid comes from malic acid, which contributes to fruitiness. A small amount of titratable acidity comes from citric acid. Wine also contains trace amounts of other acids; the least desirable acid in wine is acetic acid, which, when present in more than a nominal amount, gives the wine a sour or vinegary aspect.
Total acidity, also called titratable acidity, is the sum of the fixed and volatile acids. In the United States, the total acidity is usually expressed in terms of tartaric acid, even though other acids are also measured. Titratable acidity directly affects the color and flavor of wine and, depending on the style of the wine, is sought in a perfect balance with the sweet and bitter sensations of other components. Too much acidity makes wine tart and sharp; too little makes wines flat and uninteresting. Proper acidity in wine is what makes it refreshing and an ideal accompaniment to food. The proper acid level of wine varies, with sweeter wines generally requiring somewhat higher levels to retain the proper balance.
Application-Specific pH Electrode
The HI84502U-01 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 HI84502U-01 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 wine 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.
The built-in stirrer is automatically maintained at a speed of 600 rpm, regardless of the viscosity of the solution being titrated.
The HI84502U-01 has an intuitive user design with clearly defined keys and a large screen that is easy to navigate. The 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 wine titration.
Users are warned if there is an error in procedures such as the titration exceeded the maximum volume of titrant.
This mini titrator displays in-depth data during titration, including a real-time graph of the wine titration curve.
The HI84502U-01 allows for data logging of up to 400 samples: 200 titration results and 200 pH/mV readings. Data can be stored and exported to a USB drive or a PC using the USB connection.
In addition to being an automatic titrator, the HI84502U-01 also can be used as a pH/mV meter. As a pH meter, it has many features of a professional grade benchtop including automatic calibration up to three points with four available buffers, a 0.01 pH resolution, an accuracy of ±0.01 pH, automatic temperature compensation and comprehensive GLP data.
Accuracy is always ensured with Hanna’s unique CAL CheckTM feature, which analyzes the response of the electrode during the calibration process. Based on the electrode response in the buffer, indicators are displayed on the screen to alert the user of potential problems during calibration. These indicators include Buffer Contaminated, Electrode Dirty/Broken, and overall probe condition. The CAL CheckTM function not only ensures an accurate pH reading when the HI84502U-01 is used as a pH meter but also an accurate titration since the endpoint of a total acidity titration is determined by a set pH value.
The HI84502U-01 is a simple, fast and accurate automatic mini titrator designed for the determination of pH and titratable acidity in wine, juice, and must.
Easy to use interface with large screen and easy to navigate keys with built in tutorial mode, grapHic mode allows for real time grapH of titration curves, capability to log up to 400 sample measurements: 200 titrations and 200 pH/mV readings.
Data can be reported to a USB drive or PC