A Rapid Turbidimetric Potassium Test Modified for Use with the Pressurized Hot‐Water Extraction

References

• Attanandana , T. , Suwannarat , C. , Vearasilp , T. , Longton , S. , Meesawat , R. , Bunampol , P. , Soitong , K. , Tipanuka , C. and Yost , R. S. 2002 . “ Use of decision‐aids in on‐farm experiment in Thailand ” . In Regional Workshop on Decision‐Aids for Nutrient Management Support System Edited by: Rice , P. Thailand : NuMaSS. . Phil Rice.
   Google Scholar
• Brabson , J. A. 1966 . “ Fertilizers ” . In Standard Methods of Chemical Analysis , Part B; 6th ed Edited by: Welcher , F. J. Vol. 2 , 1483 – 1506 . Princeton : Van Nostrand .
   Google Scholar
• Burkhart , L. 1941 . Potassium determination by the cobaltinitrite method as affected by temperature and pH . Plant Physiology , 16 : 411 – 414 .
   PubMedGoogle Scholar
• Caley , E. R. 1931 . The rapid colorimetric estimation of potassium . Journal of American Chemical Society , 5 : 539 – 545 .
   Google Scholar
• Charlot , G. 1964 . “ Potassium ” . In Colorimetric Determination of the Elements, Principles and Methods 350 – 352 . Amsterdam : Elsevier Publishing Company .
   Google Scholar
• Cluley , H. J. 1955 . The determination of potassium by precipitation as potassium tetraphenylboron and its application to silicate analysis . Analyst , 80 : 354 – 364 .
   Google Scholar
• Council on Soil Testing and Plant Analysis . 1980 . “ Determination of potassium, magnesium, calcium, and sodium by neutral ammonium acetate extraction ” . In Handbook on Reference Methods for Soil Testing , Revised 58 – 63 . Athens, , Georgia : The Council on Soil Testing and Plant Analysis .
   Google Scholar
• Crane , K. S. , Webb , B. L. , Allen , P. S. and Jolley , V. D. 2006 . A simplified soil analysis procedure for use in small‐scale agriculture . Communications in Soil Science and Plant Analysis , 37 in press
   Google Scholar
• Dill , A. J. and Popovych , O. 1969 . Solubility products of potassium and triisoamyl‐n‐butylammonium picrates and tetraphenylborates in ethanol‐water mixtures at 25 degrees Celsius . Journal of Chemical Engineering and Data , 14 : 240 – 243 .
   Google Scholar
• Fulkey , G. and Czinkota , I. 1993 . Hot water percolation (HWP): A new rapid soil extraction method . Plant and Soil , 157 : 131 – 135 .
   Web of Science ®Google Scholar
• Gloss , G. H. 1953 . Sodium tetraphenylboron: A new analytical reagent for potassium, ammonium, and some organic nitrogen compounds . Chemist‐Analyst , 42 : 50 – 55 .
   Google Scholar
• Haby , V. A. 1989 . Soil NO3‐N analysis in Ca(OH)2 extracts by the chromotropic acid method . Soil Science Society of America Journal , 53 : 308 – 310 .
   Web of Science ®Google Scholar
• Hanks , D. A. , Webb , B. L. and Jolley , V. D. 1997 . A comparison of hot water extraction to standard extraction methods for nitrate, potassium, phosphorus, and sulfate in arid‐zone soils . Communications in Soil Science and Plant Analysis , 28 : 1393 – 1402 .
   Web of Science ®Google Scholar
• Kallman , S. 1959 . “ Alkali metals: Determination of potassium ” . In Treatise on Analytical Chemistry, Part 2 Edited by: Kolthoff , I. M. and Elving , P. J. Vol. 1 , 369 – 378 . New York : Interscience Encyclopedia .
   Google Scholar
• Kolthoff , I. M. and Stenger , V. A. 1942 . “ Iodometry of inorganic substances ” . In Volumetric Analysis Edited by: Kolthoff , I. M. , Belcher , R. , Stenger , V. A. and Matsuyama , G. Vol. 3 , 245 – 274 . New York : Interscience Publishers .
   Google Scholar
• Lohse , H. W. 1935 . Determination of small amounts of potassium by means of sodium cobaltinitrite . Industrial and Engineering Chemistry Analysis , 7 : 272 – 273 .
   Google Scholar
• Marczenko , Z. 1986 . “ Alkali metals ” . In Separation and Spectrophotometric Determination of Elements 123 – 128 . New York : Halstead Press .
   Google Scholar
• Melsted , S. W. 1942 . A chemical study of quick‐test techniques for potassium and calcium . Journal of Amercian Society of Agronomy , 34 : 533 – 543 .
   Google Scholar
• Motomizu , S. , Yoshida , K. and Toei , K. 1992 . Indirect spectrophotometric determination of potassium ion in water based on the precipitation with tetraphenylborate ion and a crown ether using flow injection . Analytica Chimica , 261 : 225 – 231 .
   Google Scholar
• Olson , R. V. 1953 . A turbidimetric potassium determination affected little by temperature . Soil Science Society of America Proceedings , 17 : 20 – 22 .
   Google Scholar
• Peech , M. and English , L. 1945 . Rapid microchemical soil tests . Soil Science , 57 : 167 – 195 .
   Google Scholar
• Pflaum , R. T. and Howick , L. 1956 . Spectrophotometric determination of potassium with sodium tetraphenylborate . Anal. Chem. , 28 : 1542 – 1544 .
   Google Scholar
• Schall , E. D. 1957 . Volumetric determination of potassium . Anal. Chem. , 29 : 1044 – 1046 .
   Google Scholar
• Sunderman , F. W. and Sunderman , F. W. 1958 . Studies in serum electrolytes: A rapid, reliable method for serum potassium using tetraphenylboron . Am. J. Clin. Path. , 29 : 95 – 103 .
   PubMed Web of Science ®Google Scholar
• Volk , N. J. 1941 . The determination of small amounts of exchangeable potassium in soils, employing the sodium cobaltinitrite procedure . Journal of American Society of Agronomy , 33 : 684
   Google Scholar
• Wantanabe , F. S. and Olsen , S. R. 1965 . Test of ascorbic acid method for determining phosphorus in water and NaHCO3 extractants for soil . Soil Science Society of America Proceedings , 29 : 677 – 678 .
   Google Scholar
• Webb , B. L. , Hanks , D. H. and Jolley , V. D. 2002 . A pressurized hot water extraction method for boron . Communications in Soil Science and Plant Analysis , 33 : 31 – 39 .
   Web of Science ®Google Scholar