Q2 and ASTM D 1193 Type 2. PH 5.5 to 7.0 Specification Parameters Parameter Max. Value Unit Aluminum 10 ppb Chlorides 0.1 ppm Nitrates 0.2 ppm Nitrites 0.05 ppm Sulfides 0.05 ppm Fluorides 0.1 ppm Cadmium 0.1 ppm Total Chromium 0.1 ppm Iron 0.1 ppm Copper 0.1 ppm Nickel 0.1 ppm Zinc 0.1 ppm Potassium 0.1 ppm Sodium 0.001 ppm Calcium 0.001 ppm Silica 0.01 ppm Magnesium 0.001 ppm TOC 0.1 ppm Bacterial Endotoxin 0.05 IU/ml Microbial Monitoring 10 cfu/100ml Specific production conductivity 0.05 µS/cm Specific production resistivity 18 Mohms-cm Oxidizability 0.08 mgO2/l Residue at 110°C 0.05 ppm Absorbance (254 nm) 0.01 Microfiltration 0.20 micron