Methods:HepG2,HK-2 and HLF cells were exposed to a series of concentrations of these anticholinergic agents,and the cytotoxicity was evaluated by neutral red uptake assay,and compared with the values of 50% inhibition concentration(IC50).

Combining with practice, C,S in silicomanganese were determined by IR absorption method with calibration of different reference materials of iron and using regenerated crucibleThe analytical results were satisfactory.

Determination of Sulfur in Silicon by Standard Substance Combustion Infrared Absorption;

Determination of calcium fluoride in fluorite with X-ray fluorescence spectrometry and infrared absorption;

Error analysis of determination of sulfur in iron and steel by infrared absorption

The uncertainty of measurement of carbon content by infra-red absorption method after high frequency induction furnace combustion was evaluated.

Determination of sulfur content in coal and coke by high frequency combustion-infrared absorption method;

Evaluation of uncertainty in the measurement of carbon content in steel by infrared absorption method;

Determination of sulfur in oxalic acid nickel by a high-frequency infrared absorption method;