Soru
Measure the absorbance of the unknown sample using the AAS. Using the calibration curve , determir the concentration of nickel in the unknown sample by interpolating I its absorbance value. 4. Quality Control: It is essential to run blank solutions (deionized water)to check for any instrument drift. Run a known standard solution after the sample analysis to verify the accuracy of the results. 6. Results and Calculation: . The concentration of nickel in the unknown sample is determined by findin the correspon v ) concentration I from th calibration curve based on the recorded
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Usta · 5 yıl öğretmeni
Uzman doğrulaması
Cevap
To measure the absorbance of the unknown sample using Atomic Absorption Spectroscopy (AAS) and determine the concentration of nickel, follow these steps:1. **Measure the Absorbance of the Unknown Sample:** - Place the unknown sample in the AAS instrument. - Record the absorbance value.2. **Using the Calibration Curve:** - Refer to the calibration curve that was previously created using standard solutions of known nickel concentrations. - Locate the recorded absorbance value on the y-axis of the calibration curve. - Draw a horizontal line from this point to intersect the calibration curve. - From the point of intersection, draw a vertical line down to the x-axis to read the corresponding concentration of nickel.3. **Quality Control:** - **Blank Solution:** Run a blank solution (deionized water) before analyzing the unknown sample to check for any instrument drift. This helps to zero the instrument and ensure there are no baseline deviations. - **Standard Solution:** After analyzing the unknown sample, run a known standard solution to verify the accuracy of the results. This step ensures that the instrument is still functioning correctly and that the readings are accurate.4. **Results and Calculation:** - The concentration of nickel in the unknown sample is determined by finding the corresponding concentration from the calibration curve based on the recorded absorbance value.By following these steps, you can accurately determine the concentration of nickel in the unknown sample using AAS.