DI(2-ETHYLHEXYL) PHTHALATE See DIBUTYL PHTHALATE (Method 5020) for Procedure
C6H4(COOCH2CH(C2H5)(CH2)3CH3)2
MW: 390.56
METHOD: 5020, Issue 2
CAS: 117-81-7
CLASS B
OSHA : 5 mg/m 3 NIOSH: not established ACGIH: 5 mg/m 3; STEL 10 mg/m 3
RTECS: TI0350000 Issue 1: 15 May 1985 Issue 2: 15 August 1994
PROPERTIES: oily liquids; Table 1
SYNONYMS: dibutyl phthalate: n-butyl phthalate; phthalic acid dibutyl ester; DBP; di(2-ethylhexyl) phthalate (1) : bis(2-ethylhexyl) phthalate; dioctyl phthalate; DOP; (1) Listed incorrectly as di-sec, octyl phthalate in 29CFR 1910.23. SAMPLING SAMPLER:
FILTER (0.8 µm cellulose ester membrane)
MEASUREMENT TECHNIQUE:
GAS CHROMATOGRAPHY, FID
ANALYTE:
di(2-ethylhexyl)phthalate or dibutyl phthalate
DESORPTION:
2 mL CS 2; 30 min in ultrasonic bath
FLOW RATE: 1 to 3 L/min VOL-MIN: -MAX:
10 L @ 5 mg/m 3 200 L
SHIPMENT:
routine
INJECTION VOLUME: 5 µL
SAMPLE STABILITY:
BLANKS:
DBP - ≥6 days @ 25 °C [1] DOP - not known
10% ( ≥2) of samples
TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:
300 °C 300 °C 200 to 250 °C
CARRIER GAS:
He, 30 mL/min
COLUMN:
2 m x 3 mm OD stainless steel, 5% OV-101 on 100/120 mesh Chromosorb W-HP
CALIBRATION:
solutions of analytes in CS 2 with internal standard
RANGE:
0.05 to 0.5 mg per sample
ACCURACY RANGE STUDIED: 2 to 10 mg/m 3 [1,2] (30-L samples) ACCURACY: BIAS:
not significant [1,2]
OVERALL PRECISION (sr): 0.057 [1,2]
ESTIMATED LOD: 0.01 mg per sample PRECISION (sr):
0.05 @ 0.07 to 0.3 mg per sample [1,2]
APPLICABILITY: The working range is 1 to 20 mg/m 3 for a 50-L air sample. Phthalates are widely used as plasticizers for many resins and elastomers.
INTERFERENCES: None identified. An alternate GC column is 10 m x 0.25 mm ID, 0.25-µm DB-1, fused silica capillary.
OTHER METHODS: This method combines and replaces Methods S33 [3] and S40 [4].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/92
