Page:NIOSH Manual of Analytical Methods - 1453.pdf/1



VINYL ACETATE

CH3CO2CHCH2

MW: 86.09

METHOD: 1453, Issue 3 OSHA: MSHA: NIOSH: Other OELs: EU (SCOEL); ACGIH:

1453

CAS: 108-05-4

RTECS: AK0875000 Issue 1: 15 August 1994 Issue 3: 15 March 2013

EVALUATION: FULL

None None Ceiling 4 ppm (15 min)

PROPERTIES: Liquid; BP 72.7 °C; d 0.934 g/mL @ 20 °C; VP 11.8 kPa (89 mm Hg) @ 20 °C; vapor density (air = 1) 3.0

5 ppm TWA, C 10 ppm [1] 10 ppm, STEL 15 ppm [2] 1 ppm = 3.52 mg/m3 @ NTP

SYNONYMS: Acetic acid, vinyl ester; acetic acid, ethenyl ester; Vinyl A monomer; ethylene ethanoate; 1-acetoxyethylene; ethenyl acetate; vinyl acetate monomer; vinyl ethanoate. SAMPLING SAMPLER:

SOLID SORBENT TUBE (carbon molecular sieve; 160 mg/80 mg; Carboxen 564 or equivalent)

FLOW RATE: 0.05 to 0.2 L/min VOL-MIN: -MAX:

1.5 L @ 4 ppm 24 L

SAMPLE STABILITY:

At least 30 days @ 5 °C

BLANKS:

2 to 10 field blanks per set ACCURACY

RANGE STUDIED:

3.7 to 46 mg/m3 (24-L sample) [3]

BIAS:

-0.04

ACCURACY:

):

TECHNIQUE:

GAS CHROMATOGRAPHY, FID

ANALYTE:

Vinyl acetate

DESORPTION:

1.0 mL 95:5% (v/v) methylene chloride/ methanol

INJECTION VOLUME:

SHIPMENT: Routine

OVERALL PRECISION (

MEASUREMENT

TEMPERATURE-INJECTION: 210 °C -DETECTOR: 260 °C -COLUMN: 35 °C, 5 min; 5 °C/min to 50 °C; hold 1 min CARRIER GAS:

Helium, split flow 21.0 mL/min

COLUMN:

Capillary, fused silica, 30 m x 0.32 mm, coated internally with 1 µm film (5% phenyl) methylpolysiloxane or equivalent

CALIBRATION:

Standard solutions of vinyl acetate in 95:5% (v/v) methylene chloride/methanol

RANGE:

3 to 1120 µg per sample

0.064 14.1%

1 µL

ESTIMATED LOD: 1 µg per sample PRECISION :

0.040

APPLICABILITY: The working range is 0.02 to 13.1 ppm (0.07 to 46 mg/m3) for a 24-L air sample. The method is sensitive enough for ceiling measurements. INTERFERENCES: Vinyl acetate that is not stabilized or has been depleted of inhibitor can polymerize. Any substance collected with the vinyl acetate that is capable of reacting with it is a potential interference. Acids, bases, free radical initiators, etc., are capable of reacting with vinyl acetate during and after air sampling. OTHER METHODS: This method is an update for NMAM 1453 first issued on August 15, 1994. [4] This method is adapted from OSHA Method No. 51 [5] and NIOSH 1453 Issue 2 and replaces NIOSH method P&CAM 278. [6]

NIOSH Manual of Analytical Methods (NMAM), Fifth Edition