Parameters

Technique

Site

Apparatus

Units

Temperature

Direct

In situ

Thermometer

˚C

pH

Direct

In situ

pH-meter

C.U

Total Dissolved solids (TDS)

Direct

In situ

Spectrophotometer

mg·L1

Electrical conductivity

Direct

In situ

Conductimeter

μS·cm1

Dissolved O2

Volumetry by Na2S2O3

Laboratory

Titrimetry

% saturation

Total Suspended Solids (TSS)

Colorimetry (810 nm)

Laboratory

Spectrophotometer

mg·L1

Color

Colorimetry (455 nm)

Laboratory

Spectrophotometer

Pt.Co

Dissolved CO2

Volumetry by HCl

Laboratory

Titrimetry

mg·L1

Turbidity

Direct

Laboratory

Spectrophotometer

FTU

PO 4 3 (Orthophosphate)

Colorimetry (880 nm)

Laboratory

Spectrophotometer

mg·L1

NO 3 (Nitrates)

Colorimetry (570 nm)

Laboratory

Spectrophotometer

mg·L1