Page:NIOSH Manual of Analytical Methods - 1452.pdf/1

 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