TETRAETHYL PYROPHOSPHATE
[(CH3CH2O)2PO]2O
MW: 290.19
METHOD: 2504, Issue 2
CAS: 107-49-3
2504
RTECS: UX6825000
EVALUATION: FULL
OSHA : 0.05 mg/m 3 (skin) NIOSH: 0.05 mg/m 3 (skin); Group I Pesticide ACGIH: 0.05 mg/m 3 (skin) (1 ppm = 11.86 mg/m 3 @ NTP)
PROPERTIES:
Issue 1: 15 February 1984 Issue 2: 15 August 1994
liquid; d 1.185 g/mL @ 20 °C; BP 124 °C @ 1 mm Hg; MP 32 °C; VP 0.063 kPa (0.00047 mm Hg; 0.62 ppm) @ 30 °C
SYNONYMS: diphosphoric acid tetraethyl ester; pyrophosphoric acid tetraethyl ester; TEPP
SAMPLING SAMPLER:
MEASUREMENT
SOLID SORBENT TUBE (2 Chromosorb 102 tubes in series, 100 mg and 50 mg)
TECHNIQUE:
GAS CHROMATOGRAPHY, FPD
ANALYTE:
TEPP
FLOW RATE:
0.01 to 0.2 L/min
DESORPTION:
1 mL toluene; stand 60 min
VOL-MIN: -MAX:
20 L @ 0.05 mg/m 3 48 L
INJECTION VOLUME:
5 µL
SHIPMENT:
routine
SAMPLE STABILITY:
TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:
at least 8 days @ 25 °C [1]
BLANKS:
2 to 10 field blanks per set
200 °C 200 °C 115 °C
CARRIER GAS:
N 2 or He, 30 mL/min
COLUMN:
2 m x 2-mm ID glass; Super-Pak 20M
CALIBRATION:
TEPP in toluene
RANGE:
1 to 6 µg per sample [1]
ACCURACY RANGE STUDIED:
0.025 to 0.102 mg/m 3 [1] (48-L samples)
BIAS:
- 0.6%
ˆ rT): OVERALL PRECISION (S
0.086 [1]
ACCURACY:
± 17.4%
ESTIMATED LOD: 0.1 µg per sample [1] PRECISION (Sr):
0.039 [1]
APPLICABILITY: The working range is 0.025 to 0.15 mg/m 3 for a 40-L air sample. The method is useful for both area and personal samples.
INTERFERENCES: None identified.
OTHER METHODS: This is P&CAM 336 [2] in a revised format.
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
