To determine the concentration of lead Pb in a water sample collected from an industrial site using atomic absorption spectroscopy AAS , you would need to follow these steps:1. Collect a representative water sample from the industrial site.2. Prepare the sample for analysis by filtering it to remove any suspended particles and then acidifying it with a small amount of concentrated nitric acid HNO3 to dissolve any lead present in the sample.3. Prepare a series of lead standard solutions with known concentrations by diluting a lead stock solution with deionized water. These standards will be used to create a calibration curve for the AAS instrument.4. Measure the absorbance of each lead standard solution using the AAS instrument, making sure to rinse the instrument with deionized water between each measurement to prevent cross-contamination.5. Plot the absorbance values of the lead standard solutions against their respective concentrations to create a calibration curve. This curve should be linear, with the equation y = mx + b, where y is the absorbance, x is the concentration, m is the slope, and b is the y-intercept.6. Measure the absorbance of the prepared water sample using the AAS instrument.7. Use the calibration curve equation to calculate the concentration of lead in the water sample. For example, if the measured absorbance of the water sample is y, then the concentration of lead x can be calculated as x = y - b / m.8. Report the concentration of lead in the water sample, typically in units of micrograms per liter g/L or parts per billion ppb .Please note that without the actual absorbance values and calibration curve data, it is not possible to provide a specific concentration value for the lead in the water sample.