ETHYL ACETATE 1457
CH3COOC2H5
MW: 88.10
METHOD: 1457, Issue 1
CAS: 141-78-6 EVALUATION:
OSHA : 400 ppm NIOSH: 400 ppm ACGIH: 400 ppm (1 ppm = 360 mg/m 3 @ NTP)
RTECS: AH5425000
FULL
PROPERTIES:
Issue 1: 15 August 1994
liquid, d = 0.8945 g/mL @ 25 °C; BP = 77 °C; VP = 9.7 kPa (73 mm Hg) @ 20 °C
SYNONYMS: acetic ether; acetic ester; ethyl ethanoate
SAMPLING SAMPLER:
SOLID SORBENT TUBE (coconut shell charcoal, 100 mg/50 mg)
FLOW RATE:
0.01 to 0.2 L/minute
VOL-MIN: -MAX:
0.1 L @ 1400 mg/m 3 10 L
SHIPMENT:
refrigerated
SAMPLE STABILITY:
6 days @ 5 °C [1]
BLANKS:
2 to 10 field blanks per set
MEASUREMENT TECHNIQUE:
GAS CHROMATOGRAPHY, FID
ANALYTE:
ethyl acetate
EXTRACTION:
1 mL CS 2
INJECTION VOLUME:
1 µL
TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:
ACCURACY
RANGE STUDIED:
704 to 2950 mg/m 3 [2] (6-L samples)
BIAS:
-2.1%
250 °C 300 °C 35 °C, 2 min; 10 °C/min to 150 °C
COLUMN:
DB-Wax; 30 m, 0.32-mm ID, 1-µm film thickness
CARRIER GAS:
He, 1 mL/min
MAKEUP GAS:
N 2, 30 mL/min
CALIBRATION:
standard solutions of ethyl acetate in CS 2
RANGE:
1.5 to 1,000 µg per sample [1]
ESTIMATED LOD: 0.5 µg per sample [1]
ˆ ): 0.058 [2] OVERALL PRECISION (S rT ACCURACY:
±11.8%
PRECISION (Sr):
0.019 @ 40.5 to 810 µg per sample [1]
APPLICABILITY: The working range is 0.07 to 790 ppm (0.25 to 2800 mg/m 3) for a 6-L air sample [2]. The method may be adapted for other esters with appropriate changes in chromatographic conditions.
INTERFERENCES: Any compounds with similar retention times.
OTHER METHODS: This revises Method S49 [2]. Improved recovery of analyte may be achieved with the addition of 5% butyl carbitol to the CS 2 desorption procedure [3,4].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
