Abstract:Barium sulfate turbidimetry is a routine method for soil effective sulphur determination. Due to the inefficiency of recommended analysis method in massive soil samples detection, the conventional methods has been improved. Changing 2.0g of barium chloride grain to 10mL barium chloride solution with the concentration of 200g/L. Changing 4mL stabilizer arabia glue solution to 5mL glycerin- ethyl(1+2) solution with the concentration of 6%. According to comparing experiment results, the improved method is more simple and faster than the conventional method. It can provide an accurate and reliable result. The standard curve obtained is linear with a correlation coefficient of 0.9982. Several parallel tests have been carried out by using standardized soil samples of GBW07459 (ASA-8) , GBW07460 (ASA-9) and GBW07461 (ASA-10). The test results are all within the range of standard values. The parallel relative difference is less than 10%. It has verified the liability of the improved method for soils effective sulfur determination.
