TRIBUTYL PHOSPHATE
(C4H9O)3P=O
MW: 266.32
METHOD: 5034, Issue 1
CAS: 126-73-8
5034
RTECS: TC7700000
EVALUATION: PARTIAL
OSHA : 0.5 ppm NIOSH: 0.2 ppm ACGIH: 0.2 ppm (1 ppm = 10.9 mg/m 3 @ NTP)
Issue 1: 15 August 1994
PROPERTIES: liquid; boiling point 293 C; density 0.98 g/mL @ 20 C; VP very low @ 20 C; vapor density 9.2 (air=1); flash point 166 C (closed cup)
SYNONYMS: phosphoric acid, tributyl ester; tri-n-butyl phosphate; TBP; Celluphos 4
SAMPLING SAMPLER:
FILTER (0.8-µm mixed cellulose ester membrane); above 23 C, use two filter cassettes in series
MEASUREMENT TECHNIQUE:
GC, FPD with a phosphorus filter
ANALYTE:
tributyl phosphate
FLOW RATE: 1 to 3 L/min
EXTRACTION:
10 mL diethyl ether
VOL-MIN: -MAX:
2 L @ 0.5 ppm 100 L
INJECTION VOLUME:
5 µL
SHIPMENT:
separate front and backup cassettes if two were used; seal cassettes firmly with plugs
DETECTOR:
H 2, 70 mL/min; Air 150 mL/min
SAMPLE STABILITY:
not determined
TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:
BLANKS:
2 to 10 field blanks per set
CARRIER GAS:
2.7 to 12.6 mg/m 3 [1] (100-L samples)
BIAS:
- 0.3%
N 2, 50 mL/min
COLUMN:
6-ft x -in ID stainless steel, with 3% OV-101 on 100/120 mesh Supelcoport
CALIBRATION:
standard solutions of tributyl phosphate in diethyl ether
ACCURACY RANGE STUDIED:
240 C 240 °C 150 °C
RANGE:
6 to 1500 µg per sample
ˆ ): 0.076 [1] OVERALL PRECISION (S rT ACCURACY:
± 16.8%
ESTIMATED LOD:
2 µg per sample [1]
PRECISION (Sr):
0.0146 @ 234 to 973 µg per sample [1]
APPLICABILITY: The working range is 0.006 to 1.4 ppm (0.06 to 15 mg/m 3) for a 100-L air sample. This method may be adapted to other phosphates of relatively low volatility with appropriate changes in chromatographic conditions.
INTERFERENCES: Any phosphorus-containing compound that has the same retention time as the analyte is an interference. A non-polar capillary column may be used for better resolution.
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
