NAPHTHAS
Table 1
MW: Table 1
METHOD: 1550, Issue 2
CAS: Table 1
1550
RTECS: Table 1
EVALUATION: FULL
OSHA : Table 1 NIOSH: Table 1 ACGIH: Table 1
Issue 1: 15 February 1984 Issue 2: 15 August 1994
PROPERTIES: Table 1
SYNONYMS: Petroleum ether (benzin), rubber solvent, petroleum naphtha, VM&P naphtha, mineral spirits, Stoddard solvent, kerosene (kerosine), coal tar naphtha. SAMPLING
MEASUREMENT
SAMPLER:
SOLID SORBENT TUBE (coconut shell charcoal, 100 mg/50 mg)
FLOW RATE:
0.01 to 0.2 L/min
VOL-MIN: -MAX:
1.3 L @ 400 mg/m 3; 0.2 L @ 2500 mg/m 3 20 L @ 400 mg/m 3; 3.2 L @ 2500 mg/m 3
SHIPMENT:
routine
TECHNIQUE:
GAS CHROMATOGRAPHY, FID
ANALYTE:
naphtha hydrocarbons
DESORPTION:
1 mL CS 2; stand 30 min
INJECTION VOLUME: 5 µL (packed column); 0.1 to 1 µL (capillary column)
SAMPLE STABILITY:
at least 1 week @ 25 °C
TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:
BLANKS:
2 to 10 field blanks per set
CARRIER GAS:
N 2 or He, 30 mL/min
BULK SAMPLE:
required; 5 to 10 mL
COLUMN:
glass, 3 m x 6-mm, 10% SP-2100 on Supelcoport 80/100 or 30-m fused silica capillary, 0.325-mm ID, 1.0-µm DB-1 or equivalent
ACCURACY
200 to 250 °C 250 to 300 °C 50 to 250 °C @ 8 °/min
RANGE STUDIED:
see EVALUATION OF METHOD
CALIBRATION:
solutions of bulk naphtha in CS 2
BIAS:
see EVALUATION OF METHOD
RANGE:
0.5 to 10 mg per sample [2,3,4]
ˆ ): OVERALL PRECISION (S rT ACCURACY:
0.05 [1]
see EVALUATION OF METHOD
ESTIMATED LOD: 0.1 mg per sample PRECISION (Sr):
0.01 [1]
APPLICABILITY: The working range is 100 to 2000 mg/m 3 for a 5-L air sample. This is a general procedure for analysis of various types of hydrocarbon mixtures called "naphthas" which are used as thinners in paints and varnishes and as genera l purpose solvents.
INTERFERENCES: Most naphthas are quite complex. The components elute over a wide temperature range by gas chromatography, making interferences from other substances possible. Columns and conditions must be chosen to obtain the desired degree of separation for a given mixture.
OTHER METHODS: This method combines and replaces Methods S86 [2], S380 [3] and S382 [4]. A similar method appears in the criteria document [5].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
