Open AccessEvaluation of a Meter for Testing Potassium Concentration in Low‐salinity Aquaculture Ponds
Author(s) -
Chainark Suwanit,
Boyd Claude E.
Publication year - 2010
Publication title -
journal of the world aquaculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0893-8849
DOI - 10.1111/j.1749-7345.2009.00338.x
Subject(s) - potassium , salinity , aquaculture , metre , environmental chemistry , environmental science , biology , fishery , chemistry , ecology , fish <actinopterygii> , physics , astronomy , organic chemistry
A HANNA Model HI 93750 Ion Specific Meter, Potassium provided results similar to those obtained by flame emission spectrophotometry for potassium concentrations in the range of 8–92 mg/L in low‐salinity water (2–10 ppt). Regression analyses of potassium concentrations performed using the two methods had correlation coefficients ( r ) of 0.999 for samples from ponds and 0.997 for a series of standards. In comparison with the flame emission method, the potassium meter achieved greater recovery of potassium spikes in one trial and equal recovery in a second trial. The relatively inexpensive meter is sufficiently precise and accurate for monitoring potassium concentration in low‐salinity water for pond aquaculture.