Divine said:
"Standard Additions plotting" in excel is a method used to determine the concentration of an unknown sample in a chemical analysis by comparing its signal to that of a known sample. This technique is commonly used in analytical chemistry to improve the accuracy of results.
To perform "Standard Additions plotting" in excel, you will need to first prepare a series of standard solutions with known concentrations of the analyte. Then, measure the signal of each standard solution and record it in a table in excel. Next, plot the signal versus concentration data points and use the trendline function to determine the equation of the line. Finally, use this equation to calculate the concentration of the unknown sample.
One advantage of using "Standard Additions plotting" in excel is that it can account for matrix effects, which can affect the accuracy of results in other analytical techniques. It also allows for the determination of the concentration of an unknown sample without the need for calibration standards.
While "Standard Additions plotting" can improve the accuracy of results, it does require more time and resources to prepare and measure the standard solutions. Additionally, this method may not be suitable for samples with high concentrations or when the signal is close to the detection limit.
Yes, "Standard Additions plotting" can be used for all types of analytes, including both organic and inorganic compounds. However, it is important to consider the solubility of the analyte in the standard solutions and the compatibility of the analyte with the measurement method being used.
