GLYCOLS
FORMULA: Table 1
5523
MW: Table 1
METHOD: 5523, Issue 1
CAS: Table 1
EVALUATION: PARTIAL
OSHA : No PEL NIOSH: No REL ACGIH: C 50 ppm (ethylene glycol) (1 ppm = 2.54 mg/m3 @ NTP)
NAMES & SYNONYMS:
PROPERTIES:
(1) ethylene glycol: 1,2-ethanediol; (3) 1,3-butylene glycol: 1,3-butanediol
XAD-7 OVS tube (glass fiber filter, 13-mm; XAD-7, 200mg/100mg)
Issue 1: 15 May 1996
See Table 1
(2) propylene glycol: 1,2-propanediol (4) diethylene glycol: 2-hydroxyethyl ether, 2,2'oxydiethanol
SAMPLING SAMPLER:
RTECS: Table 1
MEASUREMENT TECHNIQUE:
GAS CHROMATOGRAPHY, FID
ANALYTES:
compounds above
DESORPTION:
2 mL methanol; ultrasonicate 30 min
INJECTION VOLUME:
1 µL
FLOW RATE: 0.5 to 2 L/min VOL-MIN: 5L -MAX: 60 L SHIPMENT: SAMPLE STABILITY:
pack cold for shipment
28 days @ 5 C [1] ethylene glycol 14 days @ 5 C [1]
TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:
250 C 300 C 40 C, 8 C/min to 230 C
CARRIER GAS:
He2 @ 2.4 to 2.6 mL/min
COLUMN:
Rtx-35 fused silica capillary, 30 m, 0.53-mm ID, 3-µm film
CALIBRATION:
solutions of glycols in methanol
RANGE STUDIED: see EVALUATION OF METHOD
RANGE:
15 to 800 µg/sample
BIAS:
ESTIMATED LOD: see Table 2
BLANKS:
2 to 10 field blanks per set ACCURACY
see EVALUATION OF METHOD
OVERALL PRECISION ( ACCURACY:
rT
): not determined
PRECISION ( r):
0.04 to 0.09 [1]
not determined
APPLICABILITY: Under the GC parameters given in the method, the glycols listed above are baseline separated and can be identified based on retention time and quantified. Hexylene glycol can be determined by this method; however, no sampling or analytical evaluation has been conducted. INTERFERENCES:No specific interferences were identified. The method yields baseline separation for all analytes. OTHER METHODS: This method replaces NMAM 5500 [2], which was found deficient in the collection of ethylene glycol in aerosol form. Also ethylene glycol was not separated from propylene glycol by the chromatography.
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition
