MICROLIT E-BURETTE Manuale utente
E-Burette
PRODUCT GUIDE
Experience
the Power of
Precision in
your daily
laboratory
routine.
What is Burette
Types of Burette
Technical Specifications of Burette
Components of a Burette
How to use a Burette?
Cleaning, Maintenance and Storage of a Burette
Applications of a Burette
Choosing the right Burette
Calibration of a Burette
When is burette calibration required?
Burette Troubleshooting
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Content
What is a Burette?
Burette is an essential laboratory instrument, commonly used in the titration
process for quantitative analysis in many industrial chemical tests where
solutions of known concentration are used to find the concentration of
unknown solutions.
01
Types of Burette:
There are three types of burette:
VOLUMETRIC BURETTE
02
A volumetric burette is made of glass or plastic material, with a
volume scale printed on the burette wall. It has a stopcock at the
end of the instrument and a valve to control the flow of liquid.
The barrel of a stopcock is made of glass or plastic. Burettes are
usually fixed with a clamp in an iron stand. Normally, volumetric burette
can be classified as:
On a liquid burette, it
has a long graduated
glass tube with a
stopcock at the bottom
to control the flow of
liquid. Gravity causes
fluid to flow when the
valve is opened. The
exact amount of liquid
can be determined by
reading the volume
marked on the glass
tube.
In a gas burette, the stopcock is given at the upper side of the burette.
The tube of the burette is filled with a fluid, such as water, mercury or
other kinds of liquid and is attached to a reservoir of fluid at the bottom
of the tube. The gas is collected by displacing the fluid from the burette
and the volume of the gas is measured by the volume of the displaced
fluid.
Liquid burette
Gas burette
a.
b.
03
PISTON OR DIGITAL BURETTE:
A piston or digital burette is based on a syringe
design wherein the barrel and plunger can be
made of glass or plastic. For alkali solutions, the
barrel and plunger may be made of polyethylene
or another resistant plastic material. The barrel is
placed in a fixed position and the plunger is
moved incrementally by rotating the wheel by
hand or by means of a step motor.
The Electronic Burette or E-Burette has
an electronic display, electronic control
panel and motor controlled piston
movements that eliminate all problems
of the digital burette which dispense
manually. The accuracy of electronic
burette is higher than a digital burette
due to motor controlled dispensing. This
motorized system eliminates human
errors in the titration/dispensing
process, making the titration more
precise.
The volume is shown on a digital
display given at the top of the
burette. A high-precision syringe can
be used to deliver a very precise
amount of liquid. A motorized digital
burette can be controlled by a
computer.
ELECTRONIC BURETTE
Technical Specifications of Burette
04
An Electronic Burette comes in different sizes and the most popular volume
ranges are 10ml, 25ml and 50ml in capacity. The technical specification of
these burettes are listed below along with their permissible error limits as
specified in the DIN EN ISO 8655-3.
CAPACITY
(ml)
INCREMENT
(ml)
ACCURACY
(±%)
ACCURACY
(±ml)
CV
(±%)
CV
(±ml)
10
25
50
0.005
0.01
0.01
0.01
0.0175
0.025
0.1
0.05
0.05
0.01
0.0125
0.025
0.1
0.07
0.05
05
Components of a Burette
COMPONENTS OF VOLUMETRIC BURETTE:
Volumetric or glass burette consists of a graduated glass tube with a
stopcock at one end. The precise liquid dispensed can be determined
by volume marking given on the glass tube surface. A Tip is given at the
other end of the glass burette which is used to dispense liquid precisely.
The Stopcock helps to control the flow of liquid by rotating it clockwise
or anti-clockwise.
COMPONENTS OF ELECTRONIC BURETTE:
E-Burette is an electronic device that delivers accurate and convenient
titration while reducing the risk of accidental chemical contact. It
includes some advanced components that reduce manual operation
with high work efficiency. Some major components of E-burette are:
Recirculation Valve:a.
It prevents the loss of reagents during purging by re-directing them into
the mounted bottle.
Delivery Tube:b.
Delivery tube provides the facility to deliver the reagent beyond the
reservoir.
Inspection Window:c.
The transparent acrylic window can be replaced with an amber colored
window for the use of chemicals. These chemicals such as iodine,
potassium permanganate and silver nitrate solutions are sensitive and
can react in light. To protect these chemicals from such reactions, an
amber-colored window is used that can be easily changed.
Delivery nozzle:d.
Delivery nozzle provides a high degree of flexibility in both the
horizontal and vertical directions, facilitating easy dispensing according
to different laboratory conditions.
06
TFT Screen:e.
A user-friendly TFT touchscreen guides quick and accurate titrations and
displays numeric data up to the second decimal. It is easily operated
with Stylus.
Telescopic tube:f.
The telescopic tube is used to draw up the liquid from the reagent bottle
to e-burette. It can be adjusted in length according to a variety of bottle
sizes.
Adaptor:g.
E-burette comes with different standard sizes of adapter that
comfortably fit most laboratory reagent bottles. The standard sizes of
adapters are 28mm, 32mm, 38mm, 40mm and 45mm.
Stylus:h.
It is a sleek hand-held instrument like
pen used to operate the control panel
with ease.
Control Panel:i.
E-Burette comes with a
powerful control panel that is
used to perform functions like
automatically re-fill without
changing the reading, perform
a zero reset (via. tare). switch
the instrument off etc.
Middle Housing:j.
It consists of a
piston mechanism
inside the burette.
07
COMPONENTS OF DIGITAL BURETTE:
Digital burette is different from e-burette, although many components have
the same functionality. Recirculation Valve, Delivery Tube, Inspection
Window, Telescopic tube and Adapters have the same functionality as
Electronic Burette. The digital burette only has an electrical display but the
piston movement is manual which can be operated manually using a
wheel.
A digital display allows the user to note the volume of the liquid dispensed
out of the burette. This feature eliminates meniscus reading errors. A hand
wheel gives you the facility to set the amount of dispensed liquid by
rotating it clockwise or anti-clockwise.
Various buttons including ON/OFF button, CLEAR/Selection button and
Pause Button are available at upper housing of the digital burette that helps
to control the dispensing process.
How to use a Burette?
08
The main steps to use an Electronic burette are given below:
Open the battery panel at the back of the control panel.
Connect the battery connector to the panel wire by inserting the battery
connector into the panel, and then close the panel.
Press the ON/OFF button. The screen will display “Welcome”.
CONNECTING THE BATTERIES
Adjust the length of telescopic tube according to reservoir bottle length.
Fix the telescopic tube at the bottom of the burette. Fix it from the
wider end.
Choose the correct adapter according to the reservoir bottle and fix it by
screwing it in a clockwise direction.
Mount the instrument on a reservoir bottle by screwing it with gentle
hand torque.
SETTING UP
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