Diluting incorrectly could prove to make large errors in the results. Also, the bottom of the meniscus needed to be touching the line on the volumetric flask. Finally, not zeroing the AA Spectrometer properly would give false absorbence readings. Lite salt was used in this experiment. There are 190 mg sodium per gram in the lite salt.
Sodium is important in the body in limited amounts.
Using lite salt would be alright if the person takes in a large quantity of salt, but in general, the regular salt should be fine. This decision must be made taking into regard the person's lifestyle and eating habits. The unknown dilutions matched well with the calibration curve. The estimates were quite close to the experimental results observed. To make this experiment more accurate data from all the class using salt could have been compiled or more trials could have been done.