SULFURYL FLUORIDE
SO2F2
MW: 102.06
METHOD: 6012, Issue 1
CAS: 2699-79-8
6012
RTECS: WT5075000
EVALUATION: FULL
OSHA : 5 ppm NIOSH: 5 ppm; STEL 10 ppm; Group I Pesticide ACGIH: 5 ppm; STEL 10 ppm (1 ppm = 4.17 mg/m 3 @ NTP)
PROPERTIES:
Issue 1: 15 August 1994
gas; BP -55 °C; vapor density (air = 1) 3.5; nonflammable, colorless, odorless
SYNONYMS: sulfur difluoride, sulfuric oxyfluoride, Vikane
SAMPLING SAMPLER:
MEASUREMENT
SOLID SORBENT TUBE (coconut shell charcoal, 800 mg/200 mg)
TECHNIQUE:
ION CHROMATOGRAPHY CONDUCTIVITY DETECTION
FLOW RATE: 0.05 to 0.1 L/min
ANALYTE:
fluoride ion (F -)
VOL-MIN: -MAX:
1.3 L @ 5 ppm 10 L
EXTRACTION:
20 mL 40 m N NaOH; sonicate 60 min
SHIPMENT:
ship at 0 °C
INJECTION VOLUME:
50 µL
SAMPLE STABILITY:
ELUENT:
40 mN NaOH, 1.0 mL/min
at least 12 days @ 0 °C COLUMN:
BLANKS:
2 to 10 field blanks per set
Dionex IonPac-AG4A guard, IonPac-AS4A anion separator column; Dionex micromembrane-suppressor
DETECTOR:
conductivity, 30 µS full scale
CALIBRATION:
standard solutions of fluoride ion spiked onto sample media
RANGE:
10 to 80 µg fluoride per sample [2]
ACCURACY 20 to 420 mg/m 3 (0.2- to 6-L samples)
RANGE STUDIED: BIAS:
-3.0%
ˆ ): OVERALL PRECISION (S rT ACCURACY:
ESTIMATED LOD: 7 µg SO 2F2 per sample [2]
0.070 [1] ±16.7%
PRECISION (Sr):
0.052 (9 to 140 mg/m 3 SO 2F2 per sample) [1]
APPLICABILITY: The working range is 2.2 to 17 ppm (9 to 75 mg/m 3) for a 3-L air sample. This method is applicable to STEL measurements using a 1.5 L sample. The method has been used to sample for sulfuryl fluoride at dwelling fumigation sites [2,3].
INTERFERENCES: Other fluoride compounds may interfere.
OTHER METHODS: This method is based on the method of Bouyoucos, et al. [4]. NIOSH Method #S245 uses gas bag samples, gas chromatography/FPD [5].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
