Analytical Precision Balance
Analytical Precision Balance - Related Videos
09:51
Sample Preparation for Analytical Characterization
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2023
Source: Laboratory of Dr. B. Jill Venton - University of Virginia Sample preparation is the way in which a sample is treated to prepare for analysis. Careful sample preparation is critical in analytical chemistry to accurately generate either a standard or unknown sample for a chemical measurement. Errors in analytical chemistry methods are categorized as random or systematic. Random errors are errors due to change and are often due to noise in instrument. Systematic errors are due to...
09:05
Balance and Coordination Testing
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2023
Balance and coordination are critical components involved in the control of movement. Many sensory receptors and neural processing units are required to help individuals maintain balance while performing various activities. Deficits in balance and coordination occur in patients suffering from movement disorders or due to aging. Therefore, scientists are trying to understand the pathophysiology behind these conditions. One way to do that is by using rodent models and testing them on behavioral...
07:03
Assessment of Motor Balance and Coordination in Mice using the Balance Beam
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Cited by 395 •
2011
Deficits in fine motor coordination can be assessed with the balance beam test. Performance on the beam is quantified by the speed at which the beam is traversed and the number of times the mouse slips on the beam.
03:37
Uncertainty in Measurement: Accuracy and Precision
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2020
Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value. Suppose a quality control...
05:40
Fabricating Cotton Analytical Devices
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2016
To investigate simple fabrication approaches for multiple assay needs, we created a fluid-absorbing channel system made of cotton material. This device was used to establish a multiple detection platform, and solve contamination issues that commonly affect lateral flow-based biomedical devices, for clinical urinalysis of nitrite, total protein, and urobilinogen.
FAQs
Calibration supports accurate readings by ensuring that the balance responds appropriately to known measurement conditions, while leveling helps maintain the instrument’s intended operating position. These controls reduce systematic measurement error before small samples are weighed. In biological work, improved accuracy is especially important when measured masses determine reagent amounts and final solution concentrations.
Vibration, air currents, and temperature changes can disturb the balance response or alter the stability of a reading. Because small biological samples are measured with high sensitivity, even these environmental influences can affect repeatability. Controlling or minimizing such disturbances helps produce more consistent mass values and reduces variation during preparation of media, buffers, and assay solutions.
Careful handling helps preserve the reliability of measurements made with a highly sensitive balance. Errors introduced while placing or managing a small sample can change the recorded mass, even when the instrument itself is functioning correctly. Consistent handling therefore supports repeatability and helps ensure that the quantities used in biological solutions match the intended experimental design.
A sound workflow includes leveling the instrument, applying appropriate calibration, reducing exposure to vibration, air currents, and temperature changes, and handling the sample carefully. The mass reading should then be used for the intended preparation only after the measurement is sufficiently reliable. This sequence helps limit weighing errors that could propagate into biological experiments.
Biologists use the measured mass of reagents to prepare culture media, buffers, reagents, and assay solutions. The balance therefore connects a physical measurement to the concentration required for an experiment. Accurate weighing helps maintain the intended composition of these solutions, whereas small mass errors can change concentrations and influence subsequent biological outcomes.
Mass measurements affect the composition of solutions used across biological experiments, so inconsistent readings can produce different reagent or buffer concentrations between preparations. Calibration, leveling, environmental control, and careful handling improve measurement reliability. More reliable weighing strengthens reproducibility by making it easier to prepare experimental materials with consistent quantities and expected compositions.