Which commonly performed analyses have short holding times?
pH, chlorine residual: 15 minutes – best if performed on-site, Dissolved oxygen: 8 hours – if fixed on site, Hexavalent Chromium: 24 hours, BOD, Nitrate, Nitrite, Turbidity, MBAS, Orthophosphate, Settleable Solids: 48 hours, Microbiological analyses: (Drinking Water): 30 hours, (Wastewater): 6 hours, (Source water): 8 hours.
