High-performance liquid chromatography (HPLC)
$150
Ammonia electrode, titrimetry, colorimetry
$280
Reflux, titrimetry, colorimetry
$310
Titrimetry, colorimetry, ion selective electrode
$200
Gas chromatography–mass spectrometry (GC–MS)
$180
Iodometry, oxygen electrode, Winkler method
$250