matrix spiking solution / Calibration solutions / grade chemicals / gas chromatographs / stock standard solutions / corn oil / gas chromatograph / surrogate spiking solution / spike solution / gas chromatograms / internal standard spiking solution / gas chromatography / gas chromatography/mass spectrometry / internal standard solution / /
Organization
American Chemical Society / U.S. Securities and Exchange Commission / Group of 20 countries / Committee on Analytical Reagents / U.S. Environmental Protection Agency / /