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Analysis of Agricultural Chemicals by LC/MS

Thermally unstable and/or involatile agricultural chemicals which cannot be analyzed by GC or GC/MS can be analyzed by LC/MS.
A semi-micro column RSpak DE-213 was used for the separation.

Sample : 20ng each, 20µL
1. Asulam
2. 2-(Methyl-4-chlorophenoxy)-propionic acid, MCPP
3. Thiuram
4. Bensulide, SAP
5. Iprodione
6. Pencycuron

Instrument : Agilent 1100
Column : Shodex RSpak DE-213 (2.0mmID*150mm)
Eluent : (A): 50mM CH3COONH4 aq.
(B): CH3CN
0min to 10min, (B)10% to (B)100%
Flow rate : 0.2mL/min
Column temp. : 40°C

Instrument : Agilent 1100MSD
Mass range : 105-500(m/z)
Ionization : Electrospray
Polarity : Positive, Negative
Fragmentor : 60V
Nebulizer : N2(50psi)
Drying gas : N2(12L/min, 350°C)