Imagine that your colleague is interested in performing anodic stripping analysis of \(\mathrm{Pb}\) in drinking water and has been frustrated that he has not achieved the detection limits necessary to be able to quantify \(\mathrm{Pb}\) at the low parts per billion level. His conditions have included a one-minute deposition time from a quiet solution at a hanging mercury drop electrode using a linear voltage scan for the stripping step. Make four suggestions for changes in his procedure that will each improve the sensitivity of the analysis.