美国petrospec       
PetroSpec by PAC is the leading provider of dependable, portable, high-quality spectroscopic analyzers for measuring the chemical and physical properties of fuels. PetroSpec instruments are dedicated to field compliance testing for gasoline and diesel, helping end users meet such ASTM standards, including:

ASTM D6756
ASTM D5845
ASTM D6277
ASTM D4806