Comparative Evaluation of Inductively Coupled Plasma–Optical Emission Spectroscopy and Atomic Absorption Spectrophotometry for Determining DTPA-Extractable Micronutrients in Soils uri icon

abstract

  • A study was conducted for comparative evaluation of atomic absorptionspectrophotometry (AAS) and inductively coupled plasma?optical emission spectroscopy(ICP-OES) for determining extractable zinc (Zn), copper (Cu), manganese(Mn), and iron (Fe) in sixty diverse soil samples having a wide range in pH and organiccarbon (C). The results were significantly affected by the method of analysis and soiltype but generally did not follow a definite trend. Results for extractable Fe in Alfisolsamples were significantly greater when using ICP-OES than AAS; and the results forZn, Cu, and Mn were not significantly different for the two methods. For Vertisol samples,the results for extractable Cu were significantly greater by ICP-OES than by AAS,whereas extractable Fe and Zn were significantly greater by AAS than by ICP-OES,and the results for Mn were not significantly different for the two methods. The resultsare discussed relative to soil type and differences in soil organic carbon and pH of thesamples used in the study

publication date

  • 2015
  • 2015