Litchfield method

{
  "id": "MLC-T-CHM-006701",
  "term": "Litchfield method",
  "field": "Chemistry",
  "definition": "A semigraphical way to analyze survival times, in which the cumulative percentage dead is plotted against time on logarithmic-probability paper and a fitted line gives the median lethal time, LT50. Litchfield published it in 1949 for time-percent effect curves. It differs from the Litchfield and Wilcoxon method, which estimates dose-based values such as LD50 from dose-response data.",
  "subject": "Chemistry and Human Health",
  "references": [
    "PAC, 2009, 81, 829. 'Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)' on page 906 (https://doi.org/10.1351/PAC-REC-08-07-09)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/litchfield-method/"
}