7 Component ICP, Quality Control Standard, QC #7, in 5% HNO3

EPA 200.7, Rev. 3.3

1000ppm (µg/mL): K 50ppm (µg/mL): Si

100ppm (µg/ml): Al, Ba, B, Ag, Na

Matrix: 5% HNO3/trace HF.

Traceable to NIST.