Parameters

Unit

Methods of analysis

Instrument/Kit

Physicochemical

pH

-

pH meter

Hanna Combo Tester, HI 98129

Electrical conductivity (EC)

µS/cm

Conductivity meter

Salinity

mg/L

Dissolved Oxygen (DO)

mg/L

DO meter

DO meter, ID-100

NH₄-N, NO₃-N, NO₂-N, PO₄, COD, Fe

mg/L

Water test kit and Digital Water Analyzer

Pack Test by Kyoritsu Chemical-Check Lab; Corp. Japan, Digital Water Analyzer (Kyoritsu Water Analyzer, DPM-MT). Ammonia parameter was measured in UV-VIS Spectrophotometer (Shimadzu, UYmini-1240)

Na⁺

mg/L

AAS Emission

Sercon WES

Cl⁻

mg/L

Argentometric method

Isotope mass spectrometer (Sercon, Hydra 20-20)

Stable isotope analysis

δ¹⁸O, δD

per mill (‰) units

Water equilibrium system and isotope mass spectrometer

Sercon, WES and Sercon, Hydra 20 - 20