Page:NIOSH Manual of Analytical Methods - 1404.pdf/1

 METHYLCYCLOHEXANOL

CH3C6H10 OH

MW: 114.19

METHOD: 1404, Issue 1

1404

CAS: 25639-42-3

RTECS: GW0175000

EVALUATION: FULL

OSHA : 100 ppm NIOSH: 50 ppm ACGIH: 50 ppm (1 ppm = 4.67 mg/m 3 @ NTP)

Issue 1: 15 August 1994

PROPERTIES:

liquid; BP 155-180 °C; d 0.92 g/mL @ 20 °C; VP 0.2 kPa (1.5 mm Hg) @ 20 °C

SYNONYMS: hexahydromethylphenol; hexahydrocresol

SAMPLING SAMPLER:

CHARCOAL TUBE (coconut shell charcoal, 100/50 mg)

FLOW RATE:

0.01 to 0.2 L/min

VOL-MIN: -MAX:

1 L @ 100 ppm 15 L

SHIPMENT:

routine

MEASUREMENT TECHNIQUE:

GAS CHROMATOGRAPHY, FID

ANALYTE:

methylcyclohexanol

DESORPTION:

1.0 mL methylene chloride

INJECTION VOLUME:

5 µL

SAMPLE STABILITY:

at least 7 days @ 25 °C

TEMPERATURE-INJECTOR: -DETECTOR: -COLUMN:

BLANKS:

2 to 10 field blanks per set

COLUMN:

ACCURACY RANGE STUDIED:

215 to 920 mg/m 3 [1] (12-L samples)

BIAS:

± 2.9% [1]

ˆ ): OVERALL PRECISION (S rT

0.063 [1]

ACCURACY:

± 14.0%

230 °C 230 °C 140 °C

10% FFAP on 80/100 mesh Chromosorb W, 12 ft x 1/8 in stainless steel

CALIBRATION:

standard solutions of methylcyclohexanol in methylene chloride

RANGE:

0.55 to 17 mg per sample [1]

ESTIMATED LOD: 0.02 mg per sample [2] PRECISION (Sr):

0.019 @ 2.7 to 11.3 mg per sample [1]

APPLICABILITY: The working range is 10 to 300 ppm (46 to 1400 mg/m 3) for a 12-L air sample. Methylcyclohexanol is usually present as a 50:50 mixture of meta- and para- isomers.

INTERFERENCES: None identified.

OTHER METHODS: This revises Method S374 [2].

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94