Page:NIOSH Manual of Analytical Methods - 3502.pdf/1

 PHENOL

C6H5OH

MW: 94.11

METHOD: 3502, Issue 2

CAS: 108-95-2

RTECS: SJ3325000

EVALUATION: FULL

Issue 1: 15 February 1984 Issue 2: 15 August 1993

SYNONYMS: carbolic acid.

SAMPLING SAMPLER:

BUBBLER (0.1 N sodium hydroxide)

MEASUREMENT TECHNIQUE:

GAS CHROMATOGRAPHY, FID

ANALYTE:

phenol

pH ADJUSTMENT:

0.1 mL conc. sulfuric acid; pH < 4

INJECTION VOLUME:

5 µL

FLOW RATE: 0.2 to 1 L/min VOL-MIN: -MAX:

26 L 240 L

SHIPMENT:

hand delivery or special bubbler shipping cases

SAMPLE STABILITY:

at least 5 days @ 25 C [1]

BLANKS:

2 to 10 field blanks per set

TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:

215 C 225 C 200 C

CARRIER GAS:

N 2 or He, 50 mL/min

COLUMN:

stainless steel, 1.2 m x 6-mm OD, 35/60 mesh Tenax or equivalent

CALIBRATION:

phenol in 0.1 N sodium hydroxide

RANGE:

0.5 to 6 mg [2]

ACCURACY RANGE STUDIED: 9.5 to 38 mg/m 3 [1] (100-L samples) BIAS:

-5.87% [1]

ESTIMATED LOD: 10 µg per sample [3]

ˆ rT): 0.068 [1] OVERALL PRECISION (S ACCURACY:

+ 16.5%

PRECISION (Sr):

0.044 [1]

APPLICABILITY: The working range is 5 to 60 mg/m 3 for a 100-L air sample [4]. This method may be used for STEL measurements (15-L samples).

INTERFERENCES: None identified. Ethanol does not interfere.

OTHER METHODS: This is Method S330 in a revised format [2]; the method also appears in the phenol criteria document [4].

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/93