[Determination of dimethyl ether in workplace air with gas chromatography].

Objective: To develop determination of dimethyl ether in workplace air by GC.

Methods: Dimethyl ether were sampled with solvent desorption active carbon tube. The sampled carbon tube were desorbed by carbon tetrachloride, Elite-WAX column was used with temperature programmed from 40 to 90 degrees C, and the carrier gas programmed from 1.

[Effect of occupational stress on ambulatory blood pressure].

Objective: To explore the effect of occupational stress on ambulatory blood pressure.

Methods: 30 male healthy workers from the refrigerator assembly line in Henan province in China were investigated. Psychosocial work conditions were measured by using the Job Demand-control Model, the Effort-reward Imbalance Model questionnaires and Occupational Stress Measurement Scale.