ISOPROPYL ETHER ((CH3)2CH)2 O
MW: 102.18
METHOD: 1618, Issue 2
1618
CAS: 108-20-3
RTECS: TZ425000
EVALUATION: PARTIAL
OSHA : 500 ppm NIOSH: 500 ppm ACGIH: 250 ppm; STEL 310 ppm
Issue 1: 15 August 1994 Issue 2: 15 March 2003
PROPERTIES: liquid; 0.725 g/mL @ 20°C; BP 67.5°C; VP 15.9 kPa (119 mm Hg, 15.7% v/v) @ 20°C; explosive range 1.4 to 7.9% v/v in air
(1 ppm = 4.18 mg/m3 @ NTP) Synonyms: diisopropyl ether; 2-isopropoxypropane; 2,2'-oxybispropane
SAMPLING SAMPLER:
Solid Sorbent Tube (coconut shell charcoal; 100 mg/50 mg)
FLOW RATE:
0.01 to 0.05 L/min
VOL-MIN: -MAX:
0.1 L @ 500 ppm 3L
SHIPMENT:
Routine
SAMPLE STABILITY:
30 days @ 5 °C
BLANKS:
2 to 10 field blanks per set
ACCURACY RANGE STUDIED:
992 to 4260 mg/m3 [2] (3-L samples)
BIAS:
2.2%
MEASUREMENT TECHNIQUE:
GAS CHROMATOGRAPHY, FID
ANALYTE:
Isopropyl ether
DESORPTION:
1 mL CS2 ; stand 30 min
INJECTION VOLUME:
1 µL
TEMPERATURES -INJECTION: 250 °C -DETECTOR: 300 °C -COLUMN: 35 °C (1 min) - 150 °C ramp (10 °C /min) CARRIER GAS:
Helium (1-2 mL/min)
COLUMN:
Capillary, fused silica, 30-m x 0.32-mm ID; 3:m film 100% dimethyl siloxane
CALIBRATION:
Solutions of analyte in CS 2
RANGE:
2 to 651 µg per sample (capillary column); 1000 to 12000 µg per sample (packed column)
OVERALL PRECISION (Ö r T ): 0.056 ACCURACY:
±12.0%
ESTIMATED LOD: 0.2 µg per sample [1] PRECISION ( þ r ):
0.014 [1]
APPLICABILITY: The working range is 3 to 1170 ppm (16 to 4900 mg/m3 ) for a 3-L air sample [1]. The sorbent's capacity for the analyte has not been determined under conditions of high relative humidity [2].
INTERFERENCES: Any compound that has a similar retention time under these analytical conditions.
OTHER METHODS: This method is based on and supercedes S368 [3] and NMAM 1618 (Issue 1) [5].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition
