ANALYTICAL Flashcards
(28 cards)
highly accurate laboratory balance
designed to determine an object’s mass precisely.
Analytical Balance
Analytical Balance is also known as _______ which is class II balance
laboratory balance
from 2,000 B.C. in the Indus Valley were used by merchants for trade, balancing goods with stone weights.
Weighing scales
In ancient Egypt, scales also had spiritual meaning, used by the god _______ to judge souls
Anubis
Throughout history, various
scales were developed, with key contributions from inventors like
Leonardo da Vinci
In 1770, British balance maker ——– invented the spring scale, which no longer relied on counterweights. Instead, it used gravity and Hooke’s Law to measure weight by the pressure exerted on a spring
Richard Salter
It improved the speed and
accuracy over traditional twopan designs, using mechanical
components and
counterweights but sensitive to
environmental factors.
Single-Pan Balance
Electromechanical components, such as servo motors, enhanced accuracy and reduced manual adjustments, allowing for precise measurements
down to micrograms
Electromechanical Balances
offering faster, more accurate results and minimizing environmental influences.
Digital Analytical Balances
These advanced balances measured extremely small masses, becoming essential in industries like
pharmaceuticals and material sciences.
Microbalances and Ultramicrobalances
for real-time data sharing and remote monitoring, particularly in
laboratories
IoT integration
are thus incorporated into the design of analytical balances to offer protection from outside factors like air currents and dust that could
compromise precision
Draft shields
High precision balances typically with a
readability of 0.1 mg, used for routine
laboratory measurements.
Standard Analytical Balances
These offer higher precision (0.01 mg) and are used for weighing smaller samples.
Semi-Micro Balances
With a readability of 0.001 mg or better, these are designed for weighing extremely small samples
Micro Balances
While not as precise as analytical
balances, they provide convenience for
larger sample weights.
Top-Loading Balances
Smaller in size but still provide high
precision, suitable for limited lab space
Compact Analytical Balances
These incorporate a heating
mechanism to measure moisture
content in samples alongside weight.
Moisture Analyzers
A transparent shield that
surrounds the weighing pan
to prevent air currents or dust
from affecting the precision
of the measurement.
-It ensures accurate readings by
keeping the environment stable
glass door
used to open and close the glass doors of the
balance’s weighing chamber. These doors minimize air currents
and external disturbances from affecting the sample being
weighed, helping to maintain accuracy
door handle
flat surface where objects or
substances are placed for
weighing. It is designed to be
stable and resistant to
corrosion or chemical
reactions, ensuring accurate
measurements
balance pan
is a
component inside the weighing
chamber that surrounds the
weighing pan. It prevents air
currents within the chamber
from affecting the sample,
further improving the precision
of measurements
anti-draft ring
shows the weight of
the object placed on the
weighing pan. It usually
provides measurements in
grams, milligrams, or other
units, depending on the setting
of the balance
display screen
are adjustable to
ensure that the balance is level,
which is critical for accurate
measurements.
level adjustment feet
