Potassium Test Articles & Analysis
5 articles found
Gravimetric method Principle: potassium ion was precipitated by sodium tetraphenylborate solution in weakly alkaline medium, and potassium content was determined by potassium tetraphenylborate gravimetric method. ...
Abstract : A short comparative study has been made on the sensitivity of 2 conventional bioassays (the ISO Daphnia magna immobilization test and the ISO algal growth inhibition test with Scenedesmus quadricauda) and 3 Toxkit microbiotests : the Daphtoxkit F™ magna, also with D. magna, the Thamnotoxkit F™ with the crustacean Thamnocephalus platyurus, ...
Variation coefficients for repeated tests on the reference chemicals potassium dichromate indicate a good precision and hence a good degree of standardization of the microbiotest procedures. ...
The fathead minnow was highly sensitive to sulfate during the transitional period from embryo development to hatching in the diluted well water, and thus, additional short‐term (7‐ to 14‐d) sulfate toxicity tests were conducted starting with embryonic fathead minnow in test waters with different ionic compositions at a water hardness of 100 mg/L. Increasing ...
In this investigation, castor oil methyl ester was prepared by transesterification using potassium hydroxide (KOH) as a catalyst and tested in a four-stroke, single-cylinder compression ignition engine. The test was carried out at a constant speed of 1500 rpm at different loads. ...