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Table 2 Summary of analytical methods used for surface water sample (APHA [18])

From: Assessment of spatio-temporal variations of selected water quality parameters of Lake Ziway, Ethiopia using multivariate techniques

Parameter Method Description
Total alkalinity APHA 2320 B Titrimetric
pH Membrane Electrode Portable HACH™ model 150
EC Membrane Electrode Portable HACH™ model 150
TDS Membrane Electrode Portable HACH™ model 150
Temperature Membrane Electrode Portable HACH™ model 150
Ammonia APHA4500-NH3 C Spectrophotometric, Phenate
Nitrate Yang et al., 1998 Spectrophotometric, sodium salicylate
Nitrite APHA4500- NO2 A Spectrophotometric, Colorimetric
TN APHA4500- N C Spectrophotometric, Kjeldahl method
Phosphate APHA4500-P C Spectrophotometric, Ascorbic Acid
TP APHA4500-P C Spectrophotometric, Persulfate digestion method, then Ascorbic acid method
Secchi depth Lind Field equipment
Dissolved oxygen Membrane Electrode probe method (YSI model 58)
Silica APHA4500-SiO2 Spectrophotometric, Molybdosilicate Method