Page:NIOSH Manual of Analytical Methods - 2554.pdf/1

 GLYCOL ETHERS (1) CH3 OCH2 CHOHCH3 MW: 90.1 (2) CH3 OC3 H6 OC3 H6 OH 148.2 (3) CH3 OCH2 CH(CH3 )COOCH3 132.16 METHOD: 2554

2554

CAS: 107-98-2 34590-94-8 108-65-6

RTECS: UB7700000 JM1575000 AI8925000

EVALUATION: PARTIAL PROPERTIES:

OSHA : See Table I NIOSH: See Table I ACGIH: See Table I

Issue 1: 15 March 2003 See Table I

SYNONYMS: (1) propylene glycol monomethyl ether, 1-methoxy-2-propanol, 2-methoxy-1-methylethanol, propylene glycol methyl ether (2) dipropylene glycol monomethyl ether (3) propylene glycol monomethyl ether acetate, propylene glycol methyl ether acetate, 1-methoxy-2-propyl acetate SAMPLING SAMPLER:

FLOW RATE:

SOLID SORBENT TUBE (Anasorb® 747, 140 mg/70 mg)

3L 25 L (at lower flow rates)

SHIPMENT:

Keep cold, pack securely for shipping

BLANKS:

TECHNIQUE:

GAS CHROMATOGRAPHY, FID

ANALYTE:

See Table I

DESORPTION:

1 mL of methylene chloride/methanol (85:15) for 30 minutes in ultrasonic bath

0.1 to 0.2 L/min

VOL-MIN: -MAX:

SAMPLE STABILITY:

MEASUREMENT

INJECTION VOLUME:

1 :L

14 days @ 5°C for analytes 1 and 3; 7 days @ 5°C for analyte 2

TEMPERATURE -INJECTION: 195°C -DETECTOR: 240°C -COLUMN: 90°C (1 min) to 200°C (10°C/min)

2 to 10 field blanks per set

CARRIER GAS:

Helium, 2.8 mL/min

COLUMN:

Capillary, fused silica, 30 m x 0.32-mm ID; 100% PEG-DA, Stabilwax or equivalent

CALIBRATION:

Solutions of analytes in desorption solvent

RANGE:

(1) 1.5 to 369 :g[3] (2) 3.0 to 375 :g[3] (3) 1.5 to 369 :g[3]

ACCURACY RANGE STUDIED:

Not determined.

BIAS:

Not determined.

OVERALL PRECISION (Ö r T ):

Not determined.

ACCURACY:

Not determined

ESTIMATED LOD: (1) 0.5 :g[3] (2) 1.0 :g[3] (3) 0.5 :g[3] PRECISION ( þ r ):

(1) 0.013[3] (2) 0.031[3] (3) 0.016[3]

APPLICABILITY: The working range for propylene glycol monomethyl ether was 0.041 to 10.0 ppm (0.154 to 36.9 mg/m3 ), for dipropylene glycol monomethyl ether was 0.050 to 6.19 ppm (0.305 to 37.5 mg/m3 ), and propylene glycol monomethyl ether acetate was 0.030 to 6.83 ppm (0.151 to 36.9 mg/m3 ) for a 10 L sample. Other methods used for the collection of these analytes used a different solid sorbent and were evaluated at higher analyte concentrations [1,2]. Collection and DE recovery at levels greater than the working range listed should be equal or better than those achieved using charcoal sorbent tubes. INTERFERENCES: No specific interferences were identified. However, any compound with a similar retention time as the analytes of interest may interfere. OTHER METHODS: OSHA method 99 [1] and OSHA method 101 [2] can also be used for sampling glycol ethers at or above the REL and PEL. NIOSH Method S69, from the 2nd edition of the NIOSH Manual of Analytical Methods, was used previously for the collection and analysis of dipropylene glycol monomethyl ether and had acceptable recovery at a concentrations at or above the REL/PEL [4].

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition