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"TKN_Unfilt" .
"Concentration of nitrogen contained in organic substances plus the nitrogen in inorganic ammonia and ammonium (NH3/NH4+) per unit volume of the water column held both in solution and particles of any size."@en .
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"accepted"@en .
"Concentration of total nitrogen {total_N} per unit volume of the water body [dissolved plus reactive particulate phase] by Kjeldahl method"@en .
"SDN:P01::NTOTKJM1" .
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