Asked by Ken

Tap water is measured for arsenic and found to have a mean signal of 0.006065. Next, a small amount of Arsenic is spiked into the tap water such that the new value is 0.50ppb higher than before. The mean signal from this new low-level concentration is 0.0391, with a standard deviation of 0.0049.

1. What is the concentration detection limit?

2. What is the Lower Limit of Quantitation?