ETHYL FORMATE
CH3CH2COOH
MW: 74.08
METHOD: 1452, Issue 1
1452
CAS: 109-94-4
RTECS: LQ8400000
EVALUATION: PARTIAL
OSHA : 100 ppm NIOSH: 100 ppm; Group I Pesticide ACGIH: 100 ppm (1 ppm = 3.03 mg/m 3)
Issue 1: 15 August 1994
PROPERTIES: liquid; BP 54.5 °C; d 0.917 g/mL @ 20 °C; VP 26 kPa (194 mm Hg) @ 20 °C; vapor density (air = 1) 2.6; explosive range 2.8 to 16% v/v
SYNONYMS: formic acid, ethyl ester; ethyl methanoate
SAMPLING SAMPLER:
SOLID SORBENT TUBE (coconut shell charcoal; 100 mg/50 mg)
FLOW RATE:
0.01 to 0.2 L/min
VOL-MIN: -MAX:
0.3 L @ 100 ppm 10 L
SHIPMENT:
routine
MEASUREMENT TECHNIQUE:
GAS CHROMATOGRAPHY, FID
ANALYTE:
ethyl formate
EXTRACTION:
1 mL CS 2 ; stand 30 min.
INJECTION VOLUME:
5 µL
SAMPLE STABILITY:
unknown
TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:
BLANKS:
2 to 10 field blanks per set
CARRIER GAS:
helium, 30 mL/min
COLUMN:
stainless steel, 10% FFAP on 80/100 Chromosorb W AW-DMCS (20 ft. x 1/8 in.)
CALIBRATION:
standard solutions of ethyl formate in carbon disulfide with n-nonane as internal standard.
RANGE:
0.1 to 6 mg per sample [1]
ACCURACY RANGE STUDIED:
171-666 mg/m 3 (10-L samples) [1]
BIAS:
7.3%
225 °C 250 °C 65 °C
ESTIMATED LOD: 0.02 mg per sample ˆ ): 0.0782 [1] OVERALL PRECISION (S rT PRECISION (Sr): ACCURACY:
0.019 @ 1.71 to 6.66 mg per sample [1]
± 21.1%
APPLICABILITY: The working range is 3.3 to 210 ppm (10 to 630 mg/m 3) for a 10-L air sample.
INTERFERENCES: Any compound having the same retention time as ethyl formate under the same analytical conditions is an interference. A different temperature program or column with a different phase may eliminate the problem.
OTHER METHODS: This revises Method S36 [2].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
