General Principles of Some Other Ambient Water Quality Tests Viet Nam Provincial Environmental Governance Presented by: James Downie & Vu Thi Thu Ha Prepared by: Host DoNRE QCVN0010 2008 QCVN0010 2008 National technical regulation on surface water quality QCVN Chemical Oxygen Demand (COD) Colorimetric UV/Vis Spectrophotmeter Biochemical Oxygen Demand (BOD) Incubator & DO Meter Chloride (Cl - ) Colorimetric UV/Vis Spectrophotmeter Nitrite & Nitrate (NO 3 /NO 2 ) Ion Selective Electrode (ISE) Phosphate (PO 4 ) Colorimetric UV/Vis Spectrophotmeter Cyanide (CN - ) Ion Selective Electrode (ISE) Trace Metals (As, Cd, Pb, Cu, Zn, Ni, Fe, Hg* & Cr*) Polarography QCVN0009 2008 QCVN0009 2008 National technical regulation on underground water quality QCVN Hardness Titrimetric Method Sulphate (SO42-) Gravimetric Method Trace Metals (Mn & Se) Polarography QCVN0010 2008 QCVN0010 2008 National technical regulation on coastal water quality