kalibraatiokäyrältä

Kalibraatiokäyrältä refers to a calibration curve in Finnish. A calibration curve is a graphical tool used in analytical chemistry and other scientific fields to determine the concentration of a substance in an unknown sample. It is created by plotting the measured response of an analytical instrument against the known concentrations of a series of standard solutions. The instrument's response, such as absorbance, fluorescence, or signal intensity, is plotted on the y-axis, while the corresponding concentrations of the standards are plotted on the x-axis.

Once the calibration curve is established, the instrument's response to an unknown sample can be measured. By locating this response value on the y-axis of the calibration curve and tracing it horizontally to intersect the curve, the corresponding concentration can then be read from the x-axis. This process allows for the quantitative analysis of the substance of interest in the unknown sample. The accuracy of the calibration curve is crucial for obtaining reliable results, and it is typically generated under controlled conditions to minimize errors. Factors such as linearity, range, and the number of calibration points are important considerations when constructing a calibration curve. Regular recalibration is often necessary to ensure the ongoing accuracy of the analytical method.