What is the difference between the help-seeking standard curve and the correction curve?

The standard curve is a standard series composed of standard solution and medium, which is drawn. The matching components of standard series calibration curves must match the samples to obtain accurate measurement results. Only when the standard curve coincides with the calibration curve can the calibration curve be replaced by the standard curve. The abscissa (x) of the standard curve represents the variables that can be accurately measured (such as the concentration of the standard solution), which are called ordinary variables, and the ordinate (y) represents the response value of the instrument (also called measured values, such as absorbance, electrode potential, etc.). ), the so-called random variable. When the value of x is x 1, x2, ... xn, and the values of y measured by the instrument are y 1, y2, ... yn, respectively. Draw these measuring points Xi and Yi in the coordinate system, and draw the straight line and linear relationship between X and Y with a ruler, which is the commonly used standard curve method. The content range of the standard substance used to draw the standard curve should include the content of the tested substance in the test, and the standard curve cannot be extended at will. The scale of abscissa and ordinate of drawing paper used for drawing standard curve and the size of experimental points should not be too large or too small, and should be able to approximately reflect the measurement accuracy. Wen Shengping 853 (contact TA in the station) generally depends on what instrument you use and what the analysis requirements are. In general, it is difficult to make the standard curve consistent with the calibration curve, because the calibration curve requires the matrix of the standard sample to be consistent with the sample, and the standard curve is generally not so strict. Therefore, it is usually necessary to make sample blanks. The calibration curve of Chenlong 123 (in-station contact TA) is a deep-sea constellation obtained by eliminating background interference (in-station contact TA). In the process of making the standard curve of hexavalent chromium, several problems have been encountered, and I hope someone can give me some advice. 3. When the calibration curve was finally made, the national standard mentioned that the absorbance of the blank test should be subtracted from the measured absorbance, so if the two are the same, wouldn't the subtraction be zero? If not, then participate in the regression of 0 points when making curves, right? Mindycheng (station contact TA) is a perfect question for me to answer. 1. Similarly, this blank is called reagent blank 2. Of course, a color developer was added.