Page:NIOSH Manual of Analytical Methods - 2510.pdf/1
1-OCTANETHIOL
CH3(CH2)7SH
MW: 146.29
METHOD: 2510, Issue 2
2510
CAS: 111-88-6
RTECS: None
EVALUATION: FULL
OSHA : no PEL NIOSH: C 0.5 ppm/15 min ACGIH: no TLV (1 ppm = 5.98 mg/m 3 @ NTP)
PROPERTIES:
Issue 1: 15 February 1984 Issue 2: 15 August 1994
liquid; d 0.843 g/mL @ 20 °C; BP 199.1 °C; MP - 49.2 C; VP 0.026
kPa (1.55 mm Hg; 2040 ppm) @ 37.7 °C
SYNONYMS: n-octanethiol; octyl mercaptan; 1-mercaptooctane; octylthiol.
SAMPLING
MEASUREMENT
SAMPLER:
SOLID SORBENT TUBE (Tenax-GC, 100 mg/50 mg)
TECHNIQUE:
GAS CHROMATOGRAPHY, SULFURSPECIFIC FPD
FLOW RATE:
0.01 to 0.2 L/min
ANALYTE:
1-octanethiol (sulfur)
VOL-MIN: -MAX:
1 L @ 0.5 ppm 15 L
DESORPTION:
2 mL acetone; 45 min ultrasonic agitation
SHIPMENT:
routine
INJECTION VOLUME:
5 µL
SAMPLE STABILITY:
at least 8 days @ 25 °C
BLANKS:
2 to 10 field blanks per set
TEMPERATURE-INJECTION: -DETECTOR: -COLUMN: CARRIER GAS:
N 2 or He, 50 mL/min
COLUMN:
1.8 m x 4-mm ID glass; 3% OV-1 on 100/120 mesh Gas-Chrom Q or equivalent
CALIBRATION:
1-octanethiol in acetone
RANGE:
3 to 64 µg per sample
ACCURACY RANGE STUDIED:
0.32 to 6.55 mg/m 3 [1] (8.5-L samples)
BIAS:
- 0.013 [1]
ˆ rT): 0.083 [1] OVERALL PRECISION (S ACCURACY:
± 17.6%
160 C 200 C 115 C
ESTIMATED LOD: 0.2 µg per sample PRECISION (Sr):
0.030 [1]
APPLICABILITY: The working range is 0.05 to 1 ppm (0.3 to 6 mg/m 3) for a 10-L air sample.
INTERFERENCES: Presence of other volatile compounds may interfere with collection of 1-octanethiol or reduce capacity of sorbent tube.
OTHER METHODS: None evaluated by NIOSH.
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94