Page:NIOSH Manual of Analytical Methods - 2504.pdf/1

 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