TETRAHYDROFURAN
C4H8O
MW: 72.11
METHOD: 1609, Issue 2
CAS: 109-99-9
1609
RTECS: LU5950000
EVALUATION: PARTIAL
OSHA : 200 ppm NIOSH: 200 ppm; STEL 250 ppm ACGIH: 200 ppm; STEL 250 ppm (1 ppm = 2.95 mg/m 3 @ NTP)
PROPERTIES:
Issue 1: 15 May 1985 Issue 2: 15 August 1994
liquid; MP -108 °C; BP 66 °C; d 0.886 g/mL @ 20 °C; VP 19.3 kPa (145 mm Hg; 19% v/v) @ 20 °C; explosive range 2 to 11.8% v/v in air
SYNONYMS: diethylene oxide; THF
SAMPLING SAMPLER:
SOLID SORBENT TUBE (coconut shell charcoal, 100 mg/50 mg)
FLOW RATE:
0.01 to 0.2 L/min
VOL-MIN: -MAX:
1L 9L
SHIPMENT:
routine
MEASUREMENT TECHNIQUE:
GAS CHROMATOGRAPHY, FID
ANALYTE:
tetrahydrofuran
DESORPTION:
0.5 mL CS 2; stand 30 min
INJECTION VOLUME:
5 µL
SAMPLE STABILITY:
not determined
TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:
BLANKS:
2 to 10 field blanks per set
CARRIER GAS:
N 2, 30 mL/min
COLUMN:
stainless steel, 1.2 m x 6-mm OD, packed with 50/80 mesh Porapak Q
CALIBRATION:
tetrahydrofuran in CS 2
RANGE:
0.5 to 13 mg per sample
ACCURACY RANGE STUDIED:
323 to 1240 mg/m 3 [1] (9-L samples)
BIAS:
- 3.9%
ˆ ): 0.055 [1] OVERALL PRECISION (S rT ACCURACY:
190 °C 250 °C 185 °C
ESTIMATED LOD: 0.05 mg per sample PRECISION (Sr):
0.016 @ 3 to 11.8 mg per sample [1]
± 12.6%
APPLICABILITY: The working range is 100 to 2600 mg/m 3 (34 to 880 ppm) for a 5-L air sample.
INTERFERENCES: High humidity may reduce the breakthrough volume of the charcoal tube. The column specified may not be appropriate for large numbers of samples. CS 2 tends to dissolve some porous polymers. An alternate GC column is 30 m x 0.32mm ID fused silica capillary coated with 0.5 µm DBWAX at 60 °C [2].
OTHER METHODS: This revises Method S78 [3].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
