AMINES, AROMATIC
Table 1
MW: Table 1
METHOD: 2002, Issue 2
CAS: Table 2
Issue 1: 15 May 1985 Issue 2: 15 August 1994
PROPERTIES: Table 1
aniline: benzenamine; aminobenzene; phenylamine o-toluidine: 2-aminotoluene 2,4-xylidine: 2,4-dimethylaniline; dimethylaminobenzene N,N-dimethyl- p-toluidine: p-dimethylaminotoluene N,N-dimethylaniline: N,N-dimethylbenzeneamine SAMPLING
SAMPLER:
RTECS: Table 2
EVALUATION: FULL (1-3); PARTIAL (4,5)
OSHA : Table 2 NIOSH: Table 2 ACGIH: Table 2 SYNONYMS: (1) (2) (3) (4) (5)
2002
SOLID SORBENT TUBE (silica gel, 150 mg/75 mg)
MEASUREMENT TECHNIQUE:
GAS CHROMATOGRAPHY, FID
ANALYTE:
amines listed above
DESORPTION:
1 mL 95% ethanol; 1 h in ultrasonic bath
INJECTION VOLUME:
5 µL
CARRIER GAS:
N 2 or He, 25 mL/min
(1), (2), and (3) stable for ≥ 7 days [1]; stability data not available for (4) and (5)
COLUMN:
stainless steel, 0.6 m x 3-mm OD, packed with 80/100 mesh Chromosorb 103
2 to 10 field blanks per set
CALIBRATION:
standard solutions of analytes in 95% ethanol
RANGE:
0.1 to 3 mg per sample
FLOW RATE: Table 2 VOL-MIN: -MAX:
Table 2 Table 2
SHIPMENT:
routine
SAMPLE STABILITY:
BLANKS:
ACCURACY RANGE STUDIED:
see EVALUATION OF METHOD
BIAS:
see EVALUATION OF METHOD
ˆ rT): see EVALUATION OF METHOD OVERALL PRECISION (S ACCURACY:
ESTIMATED LOD: 0.01 mg per sample [2]; not determined for (3) PRECISION (Sr):
see EVALUATION OF METHOD
see EVALUATION OF METHOD
APPLICABILITY: See Table 2 for working ranges. A modification of this method has been used for aniline and o-toluidine at a vulcanized rubber manufacturing plant [2]. Applicability of this method for simultaneous determination of the analytes has not been investigated. A nitrogen-specific GC detector instead of an FID will greatly increase sensitivity.
INTERFERENCES: None known. Silica gel has reduced capacity for organic compounds at high humidity.
OTHER METHODS: This combines Methods S162 (xylidine) [3], S164 (dimethylaniline) [3], S168 ( o-toluidine) [3], S310 (aniline) [3], P&CAM 280 (N,N-dimethyl-p-toluidine) [4], and P&CAM 168 (aromatic amines) [5,6].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
