Agilent/ Varian Environmental Calibration Standard 25 components: Ca 1000ug/ml Fe 1000ug/ml K 1000ug/ml Mg 1000ug/ml Na 1000ug/ml Ag 10ug/ml Al 10ug/ml As 10ug/ml Ba 10ug/ml Be 10ug/ml Cd 10ug/ml Co 10ug/ml Cr 10ug/ml Cu 10u 1 * 100 mL