The
HI84532 is a simple, fast, and affordable automatic mini titrator designed
for testing the acidity of fruit juice. 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 glass body pH electrode.
The
HI84532 incorporates a precision piston style dosing pump that adjusts the
volume of titrant dosed dynamically based on a voltage change. 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 titratable acidity in fruit
juice. Results are displayed as % citric acid, tartaric acid and malic
acid. All chemicals are premixed and prepackaged including standardized
titrants, reagents and pump calibration solution. There is no need for
volumetric glassware or analytical balances making titrations fast and
easy to perform.
- Piston
driven pump for accurate dynamic dosing
- Complete
with glass double junction pH electrode
- Pre-standardized
titrant and pre-measured reagents=
More
Information
| 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 (@25ºC/77ºF) |
| 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 (@25ºC/77ºF) |
| 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 (@25ºC/77ºF), without probe error |
| Titration
Method |
acid
base titration |
| Titration
Principle |
endpoint
titration: 8.1 pH |
| Titration
Range |
Low
Range (g/100 mL): citric acid: 0.10 to 2.00% CA; tartaric acid: 0.11
to 2.35% TA; malic acid: 0.10 to 2.09% MA
High Range (g/100 mL): citric acid: 1.00 to 10.00% CA; tartaric
acid: 1.17 to 11.72% TA; malic acid: 1.05 to 10.47% MA |
| Titration
Resolution |
0.01% |
| Titration
Accuracy |
±0.02%
or 3% of reading CA whichever is greater (@25ºC/77ºF) |
| Sample
Size |
Low
Range: 5 mL High Range: 5 mL |
| Titration
Pump Speed |
10
mL/min |
| pH
Electrode |
HI1131B
glass body, refillable, 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
Magentic 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.) |
| Ordering
Information |
HI84532
is supplied with HI1131B pH electrode, HI84532-50 low range titrant
(100 mL), HI84532-51 high range titrant (100 mL), HI84532-55
calibration standard (100 mL), HI7662-T temperature probe, HI7082
electrode fill solution (30 mL), 100 mL beakers (2), 20 mL beaker,
tube set (aspiration tube with titrant bottle cap and dispensing
tube with tip), dosing pump valve, 5 mL syringe, 1 mL plastic
pipette, stir bar, power adapter, instruction manual and quality
certificate. |
MORE INFORMATION
Titratable acidity is an important
parameter in determining fruit maturity and sour taste in citrus fruits.
The maturity of fruit is one of the most important factors to determine
how well fruit will store and how it will taste. For some fruits,
governmental quality standards (based on titratable acidity or the ratio
of total soluble solids (°Brix) to titratable acidity) are in place to
protect consumers. Immature fruit will normally have a low sugar to acid
ratio as compared to mature fruit that will have a high sugar to acid
ratio.
The HI84532 measures the concentration
of titratable hydrogen ions contained in fruit juice samples by
neutralization with a strong base solution to a fixed pH. This value
includes all the substances of an acidic nature in the fruit juice
including: free hydrogen ions, organic acids and acid salts. Titratable
acidity is expressed as g/100 mL of the predominant acid. The
predominant acids in fruit depend on the type of fruit being tested and
include citric acid, tartaric acid, and malic acid.
Double
Junction pH Electrode
The HI84532 is supplied with the HI1131B
refillable, double junction, combination pH electrode. By design, the
HI1131B has a spherical tip for use in aqueous or liquid solutions. This
versatile electrode provides a wide surface of contact with a sample and
is ideal for direct measurements or titrations in the beverage industry.
Custom
pH Calibration
According to AOAC International the
titration endpoint for fruit products is pH 8.1. The HI84532 uses a
custom calibration point of pH 8.20. The preprogrammed pH 4.01 and pH
8.20 calibration points allows for calibration of the meter that
brackets the pH readings.
Good Laboratory
Practice
The
HI84532 offers comprehensive GLP information including date and time
of the last pH electrode and dosing pump calibrations. Tracking
calibrations are critical to have confidence in the results obtained
from titrations. The GLP data is stored along with any logged
readings.
Piston Driven Dosing
Pump
The heart of the HI84532 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. This titrant is dynamically dosed, where
titrant is delivered in larger doses at the start of the titration and
smaller doses near the end point. With larger doses in the beginning
of the titration, the speed of the titration is increased, where
smaller doses near the end point allow for more time for the titrant
and analyte to react. Smaller doses also prevent the over titration of
a sample and a more accurate determination of titrant volume used.
Automatic
Stirrer
The built-in stirrer is automatically
maintained at a speed of 600 rpm, regardless of the viscosity of the
solution being titrated.
On-screen
Features
Easy-to-Use
Interface The HI84532 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
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 HI84532 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.
pH/mV Meter In
addition to being an automatic titrator, the HI84532 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,
accuracy of ±0.01 pH, automatic temperature compensation and
comprehensive GLP data.
CAL Check™ Accuracy
is always ensured with Hanna’s unique CAL Check feature,
which analyzes the response of the electrode during the
calibration process. Based on electrode response in the buffer,
indicators are displayed on screen to alert the user of potential
problems during calibration. These indicators include Buffer
Contaminated, Electrode Dirty/Broken, and overall probe condition.
The CAL Check function
not only ensures an accurate pH reading when the HI84532 is used
as a pH meter, but also an accurate titration since the endpoint
of a titratable acidity titration is determined by a set pH value.
