Page:NIOSH Manual of Analytical Methods - 2523.pdf/1

 1,3-CYCLOPENTADIENE

C5H6

MW: 66.10

METHOD: 2523, Issue 2

CAS: 542-92-7

2523

RTECS: GY1000000

EVALUATION: FULL

OSHA : 75 ppm NIOSH: 75 ppm ACGIH: TWA 75 ppm (1 ppm = 2.70 mg/m 3 @ NTP)

PROPERTIES:

Issue 1: 15 May 1985 Issue 2: 15 August 1994

liquid; d 0.8021 g/mL @ 20 °C; BP 42 °C; MP -85 °C; dimerizes to solid (MP 32.5 °C); VP not available

SYNONYMS: none SAMPLING SAMPLER:

SOLID SORBENT TUBE (maleic anhydride on Chromosorb 104, 100 mg/50 mg)

FLOW RATE:

0.01 to 0.05 L/min

VOL-MIN: -MAX:

1 L @ 75 ppm 5L

SHIPMENT:

routine

SAMPLE STABILITY:

at least 1 week @ 25 °C [1]

BLANKS:

2 to 10 field blanks per set

MEASUREMENT TECHNIQUE:

GAS CHROMATOGRAPHY, FID

ANALYTE:

1,3-cyclopentadiene-maleic anhydride adduct (see REAGENTS, 1.)

DISSOLUTION:

10 mL ethyl acetate; stand 15 min

INJECTION VOLUME: 5 µL TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:

200 °C 250 °C 155 °C

CARRIER GAS:

N 2, 30 mL/min

COLUMN:

3 m x 3-mm OD stainless steel packed with 5% OV-17 on 100/120 mesh Chromosorb WHP

CALIBRATION:

analyte in ethyl acetate

RANGE:

0.2 to 1.2 mg 1,3-cyclopentadiene per sample

ACCURACY RANGE STUDIED: BIAS:

73 to 370 mg/m 3 [1] (3-L samples) 3.6%

ˆ rT): 0.066 [2] OVERALL PRECISION (S ACCURACY:

± 16.5%

ESTIMATED LOD: 0.01 mg per sample [1] PRECISION (Sr):

0.031 @ 0.3 to 1.2 mg per sample [1]

APPLICABILITY: The working range is 25 to 150 ppm (67 to 400 mg/m 3) for a 3-L air sample, based on sampler capacity at high relative humidity.

INTERFERENCES: None identified.

OTHER METHODS: This revises P&CAM 294 [2].

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