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

20 ppm; C 30 ppm; P 100 ppm

1 ppm; STEL 10 ppm (skin)

10 ppm (skin)
(1 ppm = 3.11 mg/m³ @ NTP

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

dithiocarbonic anhydride

46 to 183 mg/m³ [2]
(6-L samples)

- 0.78%

0.059 [1]

± 12.9%

GAS CHROMATOGRAPHY, SULFUR FPD

sulfur

1 mL toluene; stand 30 min

5 μL

150 °C

145 °C

30 °C

N2 or He, 20 mL/min

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

standard solutions of CS 2 in toluene

0.05 to 0.5 mg per sample

0.02 mg per sample [2]

0.052 @ 0.28 to 1.1 mg per sample [1]

The working range is 10 to 200 mg/m³ (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.

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.

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 absorption for measurement [6].