CROTONALDEHYDE CH3CH=CHCHO
MW: 70.09
METHOD: 3516, Issue 1
3516
CAS: 4170-30-3
RTECS: GP9499000
EVALUATION: FULL
OSHA : 2 ppm NIOSH: 2 ppm ACGIH: 2 ppm; suspect carcinogen (1 ppm = 2.87 mg/m 3 @ NTP)
Issue 1: 15 August 1994
PROPERTIES: liquid; pungent odor; BP 104 °C; d 0.85 g/mL @ 20 °C; VP 2.7 kPa (20 mm Hg, 2.6% v/v) @ 20 °C; explosive range 2.1 to 15.5% v/v in air
SYNONYMS: crotonic aldehyde; trans-2-butenal, crotonal
SAMPLING SAMPLER:
TECHNIQUE:
D I F F E R E N T I A L POLAROGRAPHY
FLOW RATE: 0.1 to 0.2 L/min
ANALYTE:
crotonaldehyde oxime
VOL-MIN: -MAX:
1 L @ 2 ppm 49 L
DROP TIME:
1s
SCAN RATE:
5 mV/s
SHIPMENT:
refrigerate bubblers at 8 °C during shipment if samples cannot be analyzed within 4 h
SCAN RANGE:
-0.6 to -1.2 V (vs. SCE)
CALIBRATION:
standard solutions of crotonaldehyde in hydroxylamine/formate buffer solution
RANGE:
35 to 139 µg per sample
SAMPLE STABILITY:
BLANKS:
MIDGET BUBBLER (hydroxylamine/formate buffer solution)
MEASUREMENT
4 h maximum @ 25 °C, 7 days minimum at 8 °C
P U L S E
2 to 10 field blanks per set ESTIMATED LOD: not determined PRECISION (Sr):
0.024 [1]
ACCURACY RANGE STUDIED:
2.9 to 23.4 mg/m 3 (12-L samples)
BIAS:
-2.8%
ˆ rT): 0.061 (2.9 to 11.6 mg/m 3) [1] OVERALL PRECISION (S ACCURACY:
±14.8%
APPLICABILITY: The working range is 1 to 10 ppm (2.9 to 29 mg/m 3) for a 12-L air sample. The upper limit of the method is dependent on the concentration of hydroxylamine, which should be maintained at 50-fold molar excess over total amount of crotonaldehyde sampled. Collection efficiency outside the method range has not been evaluated.
INTERFERENCES: Other volatile aldehydes (e.g., acrolein, formaldehyde, benzaldehyde).
OTHER METHODS: This is Method P&CAM 285 [2] in a revised format. An aldehyde screening method [3] and a method for priority pollutants [4], both of which include crotonaldehyde, have been described.
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
