{"Chemical":"a","Conc":500}
{"Chemical":"a","Conc":1800}
{"Chemical":"a","Conc":120}
{"Chemical":"a","Conc":490}
{"Chemical":"a","Conc":4}
{"Chemical":"a","Conc":16}
{"Chemical":"a","Conc":6250}
{"Chemical":"a","Conc":100}
{"Chemical":"a","Conc":7800}
{"Chemical":"a","Conc":7990}
{"Chemical":"a","Conc":1360}
{"Chemical":"a","Conc":4000}
{"Chemical":"a","Conc":1800}
{"Chemical":"a","Conc":36.4}
{"Chemical":"a","Conc":492}
{"Chemical":"a","Conc":50}
{"Chemical":"a","Conc":200}
{"Chemical":"a","Conc":1600}