Table 1.

Multiple Reaction Monitoring Analysis of DNPH-Carbonyls and Their Internal Standards^a

analyte	precursor ion	product ion	CEd	internal standard	precursor ion	precursor ion	CEd
DNPH-formaldehyde	209.1	163.1b	−12	formaldehyde-d2-DNPH	211.1	151.0	−13
		151.0c	−12
DNPH-acetaldehyde	223.1	151.0b	−13	acetaldehyde-d4-DNPH	227.1	151.0	−13
		163.0c	−13
DNPH-acetone	237.2	207.0b	−17	acetone-d6-DNPH	243.2	213.0	−16
		178.0c	−26
DNPH-acrolein	235.1	163.0b	−20	acrolein-DNPH-d3	238.1	161.0	−20
		158.0c	−20
DNPH-propionaldehyde	237.2	163.0b	−15	propionaldehyde-2,2,3,3,3-d5-DNPH	242.2	163.0	−18
		122.1c	−30
DNPH-crotonaldehyde	249.1	181.0b	−27	crotonaldehyde-DNPH-d3	252.1	175.0	−17
		172.0c	−17
DNPH-methyl ethyl ketone	251.0	152.0b	−26	methyl ethyl ketone-4,4,4-d3-DNPH	254.0	153.0	−26
		122.1c	−30

^aOther parameters (V): declustering potential, −10; entrance potential, −10; and collision exit potential, −9.

^bQuantitation.

^cConfirmation.

^dCE (V), collision energy.