STIBINE
SbH3
MW: 124.77
METHOD: 6008, Issue 2
CAS: 7803-52-3
6008
RTECS: WJ0700000
EVALUATION: FULL
OSHA : 0.1 ppm NIOSH: 0.1 ppm/10 h ACGIH: 0.1 ppm (1 ppm = 5.10 mg/m 3 @ NTP)
PROPERTIES:
Issue 1: 15 August 1987 Issue 2: 15 August 1994
gas; BP -17 °C; MP -88 °C; VP >1 atm
SYNONYMS: antimony trihydride
SAMPLING SAMPLER:
SOLID SORBENT TUBE (HgCl 2-coated silica gel, 1 g/0.5 g)
FLOW RATE:
0.01 to 0.2 L/min
VOL-MIN: -MAX:
4L 50 L
SHIPMENT:
routine
SAMPLE STABILITY:
at least 7 days @ 25 °C [1]
BLANKS:
2 to 10 field blanks per set
MEASUREMENT TECHNIQUE:
VISIBLE SPECTROPHOTOMETRY
ANALYTE:
antimony
EXTRACTION:
15 mL conc. HCl; 30 min
WAVELENGTH:
552 NM
CALIBRATION:
standard solutions of Sb(III) in conc. HCl
RANGE:
2 to 20 µg Sb per sample [1]
ESTIMATED LOD: 0.4 µg SbH 3 per sample [1] PRECISION (Sr):
not defined
ACCURACY RANGE STUDIED:
0.12 to 1 mg/m 3 [1] (20-L samples)
BIAS:
-1.4%
ˆ ): 0.087 [1] OVERALL PRECISION (S rT ACCURACY:
± 17.0%
APPLICABILITY: The working range is 0.1 to 3.5 mg/m 3 (0.02 to 0.7 ppm) for a 20-L air sample.
INTERFERENCES: Colorimetric determination of Sb is subject to interference by elements which form a Rhodamine B complex extractable into isopropyl ether. Am(III) (>250 µg); Au (>1000 µg); Fe(III) (>30,000 µg); Tl(I) (>1000 µg); and Sn(II) ( >1000 µg) interfere [2]. If the possibility of an interference exists, an alternate measurement procedure should be used (e.g., IC P or AAS).
OTHER METHODS: This revises Method S243 [3].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
