Consider the effective dilution factor of your spike (assuming the whole spike passed through the cartridge and was collected with the eluent.) this is equivalent to one of your calibration standards. compare the average spike addition signals for each analyte to the peak areas from the appropriate calibration standard. what % of the added spike was detected? (this is the % recovery through the spe cartridge).

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?