ALDEHYDES, SCREENING Table 1
MW: Table 1
METHOD: 2539, Issue 2
2539
CAS: Table 1
RTECS: Table 1
EVALUATION: PARTIAL
PROPERTIES:
OSHA : Table 1 NIOSH: Table 1 ACGIH: Table 1
Issue 1: 15 May 1989 Issue 2: 15 August 1994
Table 1
COMPOUNDS: acetaldehyde; acrolein; butyraldehyde ; crotonaldehyde; formaldehyde; furfural; hepta nal; hexanal; isobutyraldehyde; isovaleraledhyde; propionaldehyde; valeraldehyde. SYNONYMS: Table 1 SAMPLING SAMPLER:
SOLID SORBENT TUBE (10% 2-(hydroxymethyl) piperidine on XAD-2, 120 mg/60 mg)
FLOW RATE:
0.01 to 0.05 L/min
VOLUME:
5L
SHIPMENT:
@ 25 °C or lower
SAMPLE STABILITY:
at least 1 week @ 25 °C
FIELD BLANKS:
2 to 10 field blanks per seat
MEDIA BLANKS:
6 per set
MEASUREMENT TECHNIQUE:
GAS CHROMATOGRAPHY, FID & GC/MS
ANALYTE:
oxazolidine prepared from aldehyde
DESORPTION:
1 mL toluene; 60 min ultrasonic
INJECTION VOLUME:
1:L splitless; split vent time 30 sec
TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:
CARRIER GAS:
He, 0.5 mL/min; makeup flow, 29 mL/min
COLUMN:
capillary, 15 m x 0.32-mm, 1.0-:m film 6% cyanopropyl-phenyl, DB-1301 or equivalent
CALIBRATION:
standard solutions of aldehydes spiked on sorbent
ACCURACY RANGE STUDIED:
not studied
BIAS:
not determined
OVERALL PRECISION (Ö r T ):
not determined
ACCURACY:
not determined
250 °C 280 °C 1 min @ 70 °C, 6 °C/min to 100 °C for 2 min; 30 °C/min to 260 °C
RANGE AND PRECISION:
not determined
ESTIMATED LOD: 2 :g aldehyde per sample APPLICABILITY: This is a screening technique to determine the presence of aldehydes and should not be used for quantitation. Further confirmation of aldehyde identification should be performed by gas chromatography/ mass spectrometry (See Table 2 fo r structural ion dat a). Methods fo r quantitation of some aldeh ydes listed in th is method are available in the NIOSH Manual of Analytical Methods (See OTHER METHODS). All aldehydes tested have detected by this method in bulk field samples. INTERFERENCES: High-boiling naphtha mixtures, such as kerosene and mineral spirits may have components with retention times similar to the oxazolidines and may be interferences in the gas chromatographic analysis. A second column (DB -5, DB-WAX ) may be neede d to separate so me of the earlie r C 3 -C 4 aldehydes from excess HMP reagent. OTHER METHODS: This method incorporates sampling technology used in NIOSH methods 2501 (acrolein), 2541 (formaldehyde), 2529 (furfural), 2531 (glutaraldehyde) [1], and 2526 (valeraldehyde), and OSHA methods 68 (acetaldehyde) and 52 (acrolein/formaldehyde) [2].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition
