[The rervising of biological exposure index for carbon disulfide exposuring].

Objective: To study the biological exposure index of carbon disulfide in China.

Methods: High-performance liquid chromatography (HPLC) was used to detect the levels of 2-thiothiazolidine-4-carboxylic acid (TTCA) in the urine of the workers after working shift end, Gas chromatography was used to detect the concentrations of the carbon disulfide in the workplace air. The relationship between the urine TTCA levels and the concentrations of the carbon disulfide was analyzed, the biological exposure index and judgement result from PC-TWA were compared.

[The optimization of 2-thiothiazolidine-4-carboxylic acid back extraction in urine and determination by HPLC].

Objective: Establishment of determination method of 2-thiothiazolidine-4-carboxylic acid (TTCA) in urine with HPLC.

Methods: A volume of 0.5 ml hydrochloric acid (2 mol/L) and 0.

[The improvement of determination method of carbon disulfide in workplace air with gas chromatography].

Objective: Establishment of determination method of carbon disulfide in charcoal tube with low toxicity solvents desorption-gas chromatography.

Methods: Four types of solvent with low toxicity are applied respectively as substitution of benzene to desorb the carbon disulfide in samples of charcoal tube. The signal strength and desorption efficiency of the detector are compared by using different solvents.