PHOSPHORUS
P4
MW: 123.90
METHOD: 7905, Issue 2
7905
CAS: 7723-14-0
RTECS: TH3500000
EVALUATION: FULL
OSHA : 0.1 mg/m 3 NIOSH: 0.1 mg/m 3; Group I Pesticide ACGIH: 0.1 mg/m 3 (1 ppm = 5.07 mg/m 3 @ NTP)
Issue 1: 15 May 1989 Issue 2: 15 August 1994
PROPERTIES:
solid; d 1.83 g/mL @ 20 °C; MP 44 °C; BP 280 °C; sublimes; VP 3.5 Pa (2.6 x 10 -2 mm Hg; 172 mg/m 3) @ 20 °C; oxidizes spontaneously in air
SYNONYMS: white phosphorus; yellow phosphorus.
SAMPLING
MEASUREMENT
SAMPLER:
SOLID SORBENT TUBE (Tenax GC, 100 mg/50 mg)
TECHNIQUE:
GAS CHROMATOGRAPHY, PHOSPHORUS FPD
FLOW RATE:
0.01 to 0.2 L/min
ANALYTE:
phosphorus
VOL-MIN: -MAX:
5 L @ 0.1 mg/m 3 100 L
DESORPTION:
1 mL xylene; stand 30 min
SHIPMENT:
routine
INJECTION VOLUME:
5 µL
SAMPLE STABILITY:
7 days @ 25 °C
FIELD BLANKS:
2 to 10 field blanks per set
TEMPERATURE-INJECTION: -DETECTOR: -COLUMN: CARRIER GAS: COLUMN:
200 °C 200 °C 80 °C
He, 30 mL/min
1.8 m x 6-mm OD x 2-mm ID glass; 3% OV-101, 80/100 mesh Chromosorb WHP
ACCURACY RANGE STUDIED:
0.056 to 0.24 mg/m 3 [1] (12-L samples)
BIAS:
+ 5.5%
ˆ ): 0.090 [1] OVERALL PRECISION (S rT ACCURACY:
± 21.3%
CALIBRATION:
standard solutions of phosphorus in xylene
RANGE:
0.5 to 5 µg per sample
ESTIMATED LOD:
0.005 µg per sample [1]
ˆ ): PRECISION (S r
0.024 @ 0.6 to 2.4 µg per sample [1]
APPLICABILITY: The working range is 0.04 to 0.8 mg/m 3 (0.0008 to 0.16 ppm) for a 12-L air sample. The method is applicable to vapor-phase phosphorus only. If particulate P 4 is expected in the air sample, use a filter in the sampling train.
INTERFERENCES: None identified.
OTHER METHODS: This combines and replaces S334 [2] and P&CAM 257 [3]. P&CAM 242, utilizing impinger sampler (xylene), has not been revised [4].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
