Use a car seat with a harness for as long as possible, and keep it rear-facing for as long as possible (until your child reaches the manufacturer's height or weight limit). Keep your older child in a booster seat until at least 8 years of age and 57 inches tall. Have your child ride in a rear seat until age 13.
Flame atomic absorption spectroscopy instrument. Atomic absorption spectroscopy (AAS) is a spectroanalytical procedure for the quantitative determination of chemical elements using the absorption of optical radiation (light) by free atoms in the gaseous state.
AAS stands for Associates in Applied Science.. It is a two year college degree that is very career oriented, and designed to give the student all the expertise necessary to enter the workforce in entry level positions upon completion.