Page:NIOSH Manual of Analytical Methods - 1600.pdf/1

 CARBON DISULFIDE

CS2

MW: 76.14

METHOD: 1600, Issue 2

CAS: 75-15-0

1600

RTECS: FF6650000

EVALUATION: FULL

OSHA : 20 ppm; C 30 ppm; P 100 ppm NIOSH: 1 ppm; STEL 10 ppm (skin) ACGIH: 10 ppm (skin) (1 ppm = 3.11 mg/m 3 @ NTP)

PROPERTIES:

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

liquid; d 1.263 g/mL @ 20 °C BP 46.5 °C; MP -112 °C; VP 40 kPa (300 mm Hg; 40% v/v) @ 20 °C; explosive range 1 to 50% v/v in air

SYNONYMS: dithiocarbonic anhydride

SAMPLING SAMPLER:

SOLID SORBENT TUBE + DRYING TUBE (coconut shell charcoal, 100 mg/50 mg, and sodium sulfate, 270 mg)

MEASUREMENT TECHNIQUE: GAS CHROMATOGRAPHY, SULFUR FPD ANALYTE:

sulfur

FLOW RATE: 0.01 to 0.2 L/min

DESORPTION:

1 mL toluene; stand 30 min

VOL-MIN: -MAX:

2 L @ 10 ppm 25 L

INJECTION VOLUME:

5 µL

SHIPMENT:

dryer attached to charcoal, refrigerated

TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:

SAMPLE STABILITY:

BLANKS:

1 week @ 25 °C 6 weeks @ 0 °C

CARRIER GAS:

N 2 or He, 20 mL/min

2 to 10 field blanks per set

COLUMN:

glass, 2 m x 6-mm OD, 5% OV-17 on 80/100 mesh GasChrom Q or equivalent

CALIBRATION:

standard solutions of CS 2 in toluene

RANGE:

0.05 to 0.5 mg per sample

ACCURACY RANGE STUDIED:

46 to 183 mg/m 3 [2] (6-L samples)

BIAS:

- 0.78%

ˆ ): 0.059 [1] OVERALL PRECISION (S rT ACCURACY:

150 °C 145 °C 30 °C

ESTIMATED LOD: 0.02 mg per sample [2] PRECISION (Sr):

0.052 @ 0.28 to 1.1 mg per sample [1]

± 12.9%

APPLICABILITY: The working range is 10 to 200 mg/m 3 (3 to 64 ppm) for a 5-L air sample and is applicable to ceiling determinations. Better sensitivity may be obtained by using higher sampling rates if high humidity is not present [3,4]. This method has been used extensively in the viscose rayon industry and at carbon disulfide production facilities.

INTERFERENCES: No interference occurs from hydrogen sulfide [4]. Water vapor is a potential sampling interferant [4] which is removed by the drying tube. Alternate GC columns, e.g., 5% OV-210 on Chromosorb G-HP or DB-5 fused silica capillary, aid in resolution of chromatographic interferences.

OTHER METHODS: This revises Method S248 [5] and Method 1600 (dated 2/15/84). The criteria document method [3] uses a higher sampling rate. This method replaces P&CAM 179 which uses a similar collection method but extraction-atomic abso rption for measurement [6].

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94