Page:NIOSH Manual of Analytical Methods - 1620.pdf/1

 Rh

C6H12O2 MW: 116.16 CAS: 4016-14-2 RTECS: TZ3500000

METHOD: 0500, Issue 1

OSHA: 50 ppm

NIOSH: C 50 ppm (15 min)

ACGIH: 50 ppm; STEL 75 ppm (1 ppm = 4.75 mg/m 3 @ NTP)

PROPERTIES: liquid; d 0.919 g/mL @ 20 °C; VP 1.25<br<kPa (9.4 mm Hg, 1.2%) 25 °C

SYNONYMS: glycidyl isopropyl ether; 1,2-epoxy-3-isopropoxypropane; (1-methylethoxy)methyl)oxirane; IGE

SAMPLING

SAMPLER: SOLID SORBENT TUBE (coconut shell charcoal; 100 mg/50 mg)

FLOW RATE: 0.01 to 0.2 L/min VOL-MIN: 1 L @ 50 ppm

-MAX: 30 L

SHIPMENT: routine (refrigerate at lab)

SAMPLE STABILITY: not determined

BLANKS: 2 to 10 field blanks per set

ACCURACY RANGE STUDIED: 121 to 484 mg/m 3 [1] (10-L samples)

BIAS: -5.5%

OVERALL PRECISION (Sˆ rT): 0.067 [1]

ACCURACY: ±14.6%

MEASUREMENT TECHNIQUE: GAS CHROMATOGRAPHY, FID

ANALYTE: isopropyl glycidyl ether

DESORPTION: 0.5 mL CS2, 30 min

TEMPERATURE-INJECTION: 205 °C

-DETECTOR: 270 °C

-COLUMN: 115 °C

INJECTION VOLUME: 5 μL

CARRIER GAS: N2, 50 mL/min

COLUMN: stainless steel, 3.2-mm ID x 3 m, packed with 10% FFAP on 80/100 mesh Chromosorb W-AW DMCS

CALIBRATION: standard solutions of isopropyl glycidyl ether in CS2

RANGE: 0.25 to 5 mg per sample

ESTIMATED LOD: not determined

PRECISION (Sr): 0.020 [1]

APPLICABILITY: The working range is 5 to 105 ppm (25 to 500 mg/m 3) for a 10-L air sample. An appropriate capillary column may be used for better resolution and sensitivity. The sorbent's capacity for the analyte has not been determined under conditions of high relative humidity.

INTERFERENCES: None identified.

OTHER METHODS: This is Method S77 [2] in a revised format. NIOSH Manual of Analytical Methods (NMAM), Fourth Edition 8/15/94