AMINOETHANOL COMPOUNDS II
(1) HOCH2CH2NH2 (2) (HOCH2CH2)2NH (3) (HOCH2CH2)3N
MW: 61.10 105.14 149.19
METHOD: 3509, Issue 2
CAS:
141-43-5 111-42-2 102-71-6
EVALUATION: PARTIAL
OSHA : Table 1 NIOSH: Table 1 ACGIH: Table 1
3509
RTECS: KJ5775000 KL2975000 KL9275000 Issue 1: 15 May 1989 Issue 2: 15 August 1994
PROPERTIES: Table 1
SYNONYMS: (1) 2-aminoethanol; monoethanolamine; MEA (2) 2,2'-iminodiethanol; diethanolamine; DEA (3) 2,2',2"- nitrilotriethanol; triethanolamine; TEA SAMPLING SAMPLER:
IMPINGER (15 mL 2 mM hexanesulfonic acid)
MEASUREMENT TECHNIQUE:
ION CHROMATOGRAPHY, ion pairing [2,3]
FLOW RATE: 0.5 to 1 L/min
ANALYTE:
MEA, DEA, TEA
VOL-MIN: -MAX:
5L 300 L
INJECTION LOOP VOLUME:
50 µL
SHIPMENT:
routine
ELUENT:
SAMPLE STABILITY:
2 mM hexanesulfonic acid (HSA), 1 mL/min (2 mM HSA/0.5% v/v acetonitrile may also be used to reduce run time)
stable at least 3 weeks @ 20 C [1] COLUMNS:
BLANKS:
2 to 10 field blanks per set
Ion-pairing guard and cation separator, Dionex MPIC-NG1,MPIC-NS1, and cation suppressor
CONDUCTIVITY SETTING:
3 µS full scale
ACCURACY RANGE: RANGE STUDIED: see EVALUATION OF METHOD [1] and Table 2 BIAS:
not determined
ˆ ): not determined OVERALL PRECISION (S rT ACCURACY:
not determined
see EVALUATION OF METHOD [1] and Table 2
ESTIMATED LOD: 7 to 20 µg per sample (Table 2) PRECISION (Sr):
see EVALUATION OF METHOD [1] and Table 2
APPLICABILITY: The working ranges for MEA, DEA, and TEA are 0.08 to 12 ppm (0.2 to 30 mg/m 3), 0.09 to 7 ppm (0.4 to 30 mg/m 3) and 0.1 to 5 ppm (0.6 to 30 mg/m 3), respectively, for a 100-L air sample. The method is better suited to area sampling than personal sampling because it uses an impinger for sample collection.
INTERFERENCES: Larger amines such as cocomorpholine, triethylenediamine, 4-ethylmorpholine, 2-oxybis(N,N-dimethyl)ethylamine, n-cetyl- N,N-dimethylamine do not elute under these analytical conditions and do not interfere. Other low molecular weight amines may interfere. Sodium and ammonium ions can interfere with MEA.
OTHER METHODS: This is adapted from the method of Bouyoucos and Melcher [2,3]. There are no other NIOSH methods for DEA or TEA. MEA can be determined by method 2007, using silica gel collection and gas chromatographic analysis.
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
