移取2 μL二硫化碳标准储备溶液（二硫化碳的绝对质量小于4 μg）于动态稀释仪中，在选定的最佳条件下（吹扫流量为1 000 mL·min^-1，吹扫时间为10 min）操作。仪器的出气口与活性炭吸附管连接，使空气中的二硫化碳被活性炭吸附。吹扫时间结束时，取下吸附管，移置于全自动热脱附仪中，按仪器工作条件操作，使二硫化碳解吸并引入气相色谱仪，在DB-5色谱柱（60 m×0.25 mm，0.25 μm）上按程序升温（温度区间为50~250℃）模式进行分离，按设定条件用质谱法测定二硫化碳的含量。用二硫化碳标准溶液系列绘制标准曲线，其线性范围在0.010~2.0 mg·L^-1之间，检出限（3s）为0.007 μg。当采集体积为10 L时，其检出限为0.7 μg·m^-3。用标准加入法进行回收试验，测得回收率在105%~110%之间，测定值的相对标准偏差（n=6）均小于4%。为检测吸附管中二硫化碳的稳定保持时间，取2 μL二硫化碳标准储备溶液9份，分别按上述条件吹扫，并吸附于9个吸附管中，在不同的时间测定其二硫化碳的含量。结果表明，吸附管中二硫化碳至少可保存72 h，在室温（23℃）和低温（-18℃）条件下，保存的吸附管中二硫化碳的测定结果之间无明显差异。

A dynamic dilution instrument, with its gas outlet connected with an activated carbon adsorption tube, was used for sampling of air and separation of CS₂ from air by adsorption on activated carbon. An aliquot of 2 μL of CS₂ standard reserve solution (absolute mass of CS₂<4 μg) was introduced into the instrument and the air sample was collected under the optimum conditions (i.e., with flow-rate of 1 000 mL·min^-1 and time of 10 min in sweeping). At the end of sweeping time, the adsorption tube was dis-connected and transferred to be thermo-desorption device in which the CS₂ adsorbed on activated carbon was desorbed under the working condition of the desorption device and transferred to gas chromatograph to be separated on DB-5 chromatographic column (60 m×0.25 mm, 0.25 μm) under the mode of programed temperature elevation in the range between 50℃ to 250℃. Finally, CS₂ separated by GC was determined by MS. Standard curve was prepared with standard solution of CS₂ and analyzed by the same procedure described above. Linearity range of CS₂ was found between 0.010 mg·L^-1 to 2.0 mg·L^-1 with detection limit (3s) of 0.007 μg or 0.7 μg·m^-3 when 10 L of air sample were collected. Recovery was tested by the standard addition method giving value of recovery in the range of 105%-110%. Values of RSD (n=6) were found all less than 4%. To test for time of keeping of the CS₂ adsorbed on activated carbon in the adsorption tube, 9 portions of 2 μL of CS₂ standard reserve solution were taken and treated in the same way in the dynamic dilution instrument separately and 9 adsorption tubes with adsorbed CS₂ were obtained and their contents of CS₂ were determined by GC-MS after keeping for different times. It was shown that the concentration of CS₂ in the adsorption tubes were kept stable at least for 72 h, and in further, the contents of CS₂ determined in adsorption tubes kept under room temperature (23℃) and under low temperature (-18℃) showed no significant difference.