Page:NIOSH Manual of Analytical Methods - 6012.pdf/1

 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