EPN
C14 H14 NO4PS
W: 323.31
METHOD: 5012, Issue 2
5012
CAS: 2104-64-5
RTECS: TB1925000
EVALUATION: FULL
OSHA : 0.5 mg/m 3 (skin) NIOSH: 0.5 mg/m 3 (skin); Group I Pesticide ACGIH: 0.5 mg/m 3 (skin)
PROPERTIES:
Issue 1: 15 May 1989 Issue 2: 15 August 1994
solid; MP 36 °C; d 1.268 g/mL @ 25 °C VP 0.04 Pa (0.0003 mm Hg, 5 mg/m 3) @ 100 °C
SYNONYMS: phenylphosphonothioic acid O-ethyl-O,p-nitrophenyl ester
SAMPLING
MEASUREMENT
SAMPLER:
FILTER (glass fiber)
TECHNIQUE:
GAS CHROMATOGRAPHY, FLAME PHOTOMETRIC
FLOW RATE:
1 to 2 L/min
ANALYTE:
EPN
VOL-MIN: -MAX:
15 L @ 0.5 mg/m 3 700 L
DESORPTION:
15 mL isooctane
INJECTION VOLUME:
5 µL
FIELD TREATMENT:
transfer filters within 1 h of sampling to vial
SHIPMENT: SAMPLE STABILITY:
TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:
215 °C 215 °C 205 °C
in vials
at least 7 days @ 25 °C
CARRIER GAS:
N 2 or He, 60 mL/min
COLUMN:
2 m x 6-mm glass, packed with 3% OV-1 on 100/120 mesh Gas Chrom Q
CALIBRATION:
solutions of the EPN in isooctane
RANGE:
6 to 170 µg per sample
ACCURACY RANGE STUDIED:
0.3 to 1.2 mg/m 3 [1] (120-L samples)
BIAS:
0%
ˆ ): 0.06 [1,2] OVERALL PRECISION (S rT ACCURACY:
ESTIMATED LOD: 2 ng per sample [1] PRECISION (Sr):
0.04 [1]
± 11.4%
APPLICABILITY: The working range is 0.05 to 1.5 mg/m 3 EPN for 120-L air samples. Malathion and Parathion have also been determined by this procedure.
INTERFERENCES: None known.
OTHER METHODS: This method replaces Method S285 [2]. The method of Hill and Arnold [3] has also been used for analysis of pesticides. Method 5600 is an alternative method for organophosphorus pesticides.
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
