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
