Page:NIOSH Manual of Analytical Methods - 1013.pdf/1



PROPYLENE DICHLORIDE	1013 CH3CHClCH2Cl   MW: 112.99    CAS: 78-87-5   RTECS: TX9625000 METHOD: 1013, Issue 2

EVALUATION: FULL

OSHA:	 75 ppm NIOSH:	lowest feasible; carcinogen; Group I pesticide ACGIH:	 75 ppm; STEL 110 ppm; carcinogen (1 ppm = 4.62 mg/m³ @ NTP)

Issue 1:	15 May 1985 Issue 2:	15 August 1994

PROPERTIES:	 liquid; d 1.159 g/mL @ 25 °C; BP 95 °C; MP −70 °C; VP 5.3 kPa (40 mm Hg; 5.2% v/v) @ 20 °C; explosive range 3.4 to 14.5% v/v in air

SYNONYMS:	 1,2-dichloropropane SAMPLING

MEASUREMENT

SAMPLER:	 SOLID SORBENT TUBE (petroleum charcoal, 100 mg/50 mg)

TECHNIQUE:

GAS CHROMATOGRAPHY, ELECTROLYTIC CONDUCTIVITY DETECTOR (HALL)

FLOW RATE:	 0.01 to 0.2 L/min

ANALYTE:

propylene dichloride

VOL-MIN: -MAX:

DESORPTION:

1 mL 15% (v/v) acetone/cyclohexane; ultrasonic bath, 30 min

0.1 L @ 75 ppm 3.5 L

SAMPLE STABILITY:	 at least 26 days @ 25 °C in the dark [1]

INJECTION VOLUME:

BLANKS:

TEMPERATURE-INJECTION:	150 °C -COLUMN:	50 °C

2 to 10 field blanks per set ACCURACY

5 µL

RANGE STUDIED:

0.12 to 128 mg/m³ [1] (3-L samples)

HALL DETECTOR FURNACE:	840 °C -ELECTROLYTE:	0.9 mL/min -HYDROGEN:	50 mL/min

BIAS:

3%

CARRIER GAS:

N2, 25 mL/min

COLUMN:

nickel, 3 m × 2-mm ID, 3% Carbowax 1500 on 60/80 mesh Chromosorb WHP

CALIBRATION:

solutions in acetone/cyclohexane

RANGE:

0.5 to 400 µg per sample [2]

OVERALL PRECISION :	0.064 [1] ACCURACY:

±15.5%

ESTIMATED LOD:	 0.1 µg per sample [2] PRECISION :

0.031 @ 0.5 to 520 µg per sample [1]

APPLICABILITY: The working range is 0.05 to 130 ppm (0.25 to 600 mg/m³) for a 2-L air sample at about 90% RH. INTERFERENCES: Propylene dichloride cannot be resolved from 1,2-dichloroethane with a Carbowax packed column. They were resolved with a Carbowax capillary column. OTHER METHODS: This revises P&CAM 321 [2].

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition