อุปกรณ์การไทเทรต

HI 84432

Titratable Acidity Mini Titrator and pH Meter for Fruit Juice

Based on the AOAC International accepted method for acidity determination
Log on demand up to 100 total samples
GLP features
Eliminates subjective factors
Three point calibration
Automatic pH temperature compensation
Automatic “anytime” help
Intuitive user interface

The HI 84432 digital automatic mini titrator and pH meter is designed for quick and accurate analysis of total titratable acidity in fruit juices. By eliminating subjective factors including color indicators, errors in mathematical calculations or erratic titrant additions from the measurement, the HI 84432 provides quick and accurate, repeatable results without guesswork.

A clear and intuitive user interface allows users to navigate the HI 84432’s menus and functions quickly. A HELP key located on the keypad aids in set-up, calibration status and troubleshooting.

By simply pressing the START key, the HI 84432 automatically starts pump operation and titrates the sample to the endpoint. This instrument employs a powerful and effective algorithm to analyze the pH response to determine the exact pH endpoint, then uses this algorithm to make the necessary calculations.

The titratable acidity determination is instantaneously displayed in selected measurement units on the large dot matrix display. The instrument is immediately ready for the next analysis.

The HI 84432 has a simple and accurate peristaltic pump to ensure the best accuracy and repeatability. To ensure instrument accuracy, perform a pump calibration with the provided HANNA standard.

Why This Instrument is So Important…

The measurement of titratable acidity in fruit juices measures the concentration of titratable hydrogen ions contained in the fruit juice samples by neutralization with strong base solution to a fixed pH. This value includes all the substances of an acidic nature in the fruit juice: free hydrogen ions, organic acids, acid salts and cathions.

Because the organic acid is the most acidic component of the fruit juices that react with strong base solutions, the titratable acidity is usually expressed as a percentage (mass/volume) of the predominant acid:

Citric acid is present in many fruit species.
Tartaric acid is essentially found in grapes.
Malic acid is present in many fruit species, sometimes together with citric acid or tartaric acid in unripe grapes.

The HI 84432 Mini Titrator uses a method based on the Official Methods of Analysis of AOAC International. The fruit juice is titrated with a sodium hydroxide solution until the end point at 8.2 pH is reached (determined by potentiometric method). Additionally the HI 84432 has a built-in pH meter for pH measurement (electrode and meter must be calibrated).

Order Information:
HI 84432-01 (115V) and HI 84432-02 (230V) are supplied with HI 1131B pH electrode, HI 7662-M temperature probe, HI 84432-50 titrant (100 mL), HI 84432-55 pump calibration solution (100 mL), HI 70004 pH 4.01 buffer solution sachets (2), HI 70007 pH 7.01 buffer solution sachets (2), HI 700082 pH 8.20 buffer solution sachets (2), 100 mL beakers (2), tube set with dispensing tip, medium magnetic stir bars (2), 12 VDC adapter and instruction manual.

Specifications

Titrator Titratable Acidity
Range 15 mL sample g/100 mL as citric acid : 0.20 – 1.20% CA
g/100 mL as tartaric acid : 0.23 – 1.41% TA
g/100 mL as malic acid : 0.21 – 1.26% MA
Titratable Acidity
Range 2 mL sample g/100 mL as citric acid : 0.80 – 8.00% CA
g/100 mL as tartaric acid : 0.94 – 9.30% TA
g/100 mL as malic acid : 0.84 – 8.30% MA
Titratable Acidity
Resolution 0.01%
Accuracy
(@25ºC/77ºF) 5% of reading ±0.02
Titration Method acid-base titration
Principle endpoint titration: 8.20 pH
Pump Debit 0.5 mL/min
Stirring Speed 600 rpm
Logging Data up to 50 samples
pH Meter Range -2.0 to 16.0 pH / -2.00 to 16.00 pH
Resolution 0.1 pH / 0.01 pH
Accuracy
(@25ºC/77ºF) ±0.01 pH
Calibration one, two or three calibration points; three available buffers (4.01; 7.01; 8.20)
Temperature
Compensation manual or automatic from -20 to 120°C (-4 to 248°F)
Logging Data up to 50 samples
Temperature Range -20.0 to 120.0°C (-4.0 to 248.0°F)
Resolution 0.1°C
Accuracy
(@25ºC/77ºF) ±0.4°C without probe error
Electrode   HI 1131B glass body pH electrode with BNC connector and 1 m (3.3’) cable
Environment   0 to 50°C (32 to 122°F); RH max 95% non-condensing
Power Supply   12 VDC adapter (included)
Dimensions   208 x 214 x 163 mm (8.2 x 8.4 x 6.4”) (with beaker)
Weight   2200 g (77 oz.)

MSDS

Click on the links below to download the Safety Data Sheet.

HI 84432-50
HI 84432-55

Accessories

Solutions
HI 7004M 4.01 pH Buffer Solution
HI 7007M 7.01 pH Buffer Solution
1 x 230 mL bottle
HI 70082M pH 8.20 Buffer Solution
HI 70300M Electrode Storage Solution
1 x 230 mL bottle
Reagents & Standards
HI 84432-50 Titrant Solution (1 mL/analysis)
HI 84432-55 Pump Calibration Solution
HI 84432-70 Replacement Reagents Kit