Wednesday, April 05, 2006
Liters and liters of water must be collected in hopes to capture the tiniest amount of some chemicals. The water must be prepared for storage, and then carefully kept from light. Many times the tiniest amounts, perhaps in parts per million (even trillion), can have dire effects on those (people and other animals) who drink or swim in the water. Then to isolate and find those compounds which have been shown to produce adverse affects, the equipment for finding them must be calibrated (and sensitive) to those amounts. Then the number of times the water must be collected (or for any other scientific study... the number samples ) must be high enough to demonstrate a trend - in other words - to have significance.