VALERALDEHYDE
CH3(CH2)3CH=O
M.W.: 86.13
METHOD: 2536, Issue 2
CAS: 110-62-3
EVALUATION: FULL
OSHA : no standard NIOSH: 50 ppm ACGIH: 50 ppm (1 ppm = 3.52 mg/m 3 @ NTP)
2536
PROPERTIES:
RTECS: YV3600000 Issue 1: 15 May 1989 Issue 2: 15 August 1994
liquid; d 0.810 g/mL @ 20 °C; BP 103 °C; VP 6.7 kPa (50 mm Hg) @ 25 °C; vapor density (air = 1) 3.0; flash point = 12.2 °C
SYNONYMS: pentanal; amyl aldehyde.
SAMPLING SAMPLER:
SOLID SORBENT TUBE (10% 2-(hydroxymethyl)piperidine on XAD-2, 120 mg/60 mg)
FLOW RATE:
0.01 to 0.04 L/min
VOL-MIN: -MAX:
0.5 L@ 50 ppm 10 L
SHIPMENT:
routine
SAMPLE STABILITY:
at least 4 weeks @ 25 °C [1]
FIELD BLANKS:
2 to 10 field blanks per set
MEDIA BLANKS:
18 per set
MEASUREMENT TECHNIQUE:
GAS CHROMATOGRAPHY, FID
ANALYTE:
valeraldehyde oxazolidine (9-butyl-1aza-8-oxabicyclo[4.3.0]nonane)
DESORPTION:
2 mL toluene, 60 min ultrasonic
INJECTION VOLUME:
1 µL splitless
TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:
250 °C 280 °C 0.5 min @ 70°C; 50 °C/min to 120°C, hold 4 min; 20°C/min to 170°C, hold 7 min
CARRIER GAS:
He, 27 cm/sec linear velocity makeup flow 29 mL/min
COLUMN:
capillary, 15 m x 0.32-mm, 5% phenyl, 95% methyl polysiloxane, 1-µm film (DB-5 or equivalent)
CALIBRATION:
standard solutions of valeraldehyde on sorbent
OVERALL PRECISION (SrT): 0.073 [1]
RANGE:
4 to 3900 µg per sample [1]
ACCURACY:
ESTIMATED LOD: 2 µg per sample [1]
ACCURACY RANGE STUDIED:
9 to 374 mg/m 3 [1] (12-L samples)
BIAS:
0.12%
± 14.4%
PRECISION (Sr):
0.066 @ 2 to 508 µg per sample [1]
APPLICABILITY: The working range is 0.11 to 110 ppm (0.4 to 390 mg/m 3) for a 10-L air sample. The method is also suitable for determination of furfural and glutaraldehyde in a mixture [2].
INTERFERENCES: None have been observed; an alternate capillary column, 15 m x 0.32-mm cyanopropylphenyl dimethylpolysiloxane, 1-µm film (DB-1301) can be used.
OTHER METHODS: The method of Lipari and Swarin [3] uses 2,4-dinitrophenylhydrazine for the collection of valeraldehyde.
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
