3.75 mL of suspension from each bottle was pipetted into a separate 50-mL volumetric flask. About 25 mL of HPLCgrade water was added to each flask, and the flasks were placed on an orbital shaker ...

Then, 1.5 mL of 20% sodium carbonate was added and made up to volume with distilled water in a 10 mL volumetric flask. The solution was mixed for 1 min and then kept in the dark. After 1 h, a ...

Therefore, the quantity of ammonium nitrogen is a routine examination for the monitoring of surface water and wastewater in China. The development of a sensitive and selective analytical method for ...

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Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States ...