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12. ABBREVIATIONS
EPA: US Environmental Protection Agency
°C: degree Celsius
°F: degree Fahrenheit
µg/L: micrograms per liter (ppb)
mg/L: milligrams per liter (ppm)
g/L: grams per liter (ppt)
mL: milliliter
GLP good laboratory practice
UHR ultra high range
ULR ultra low range
HR: high range
MR: medium range
LR: low range
PAN: 1‑(2‑pyridylazo)‑2‑naphtol
TPTZ: 2,4,6‑tri‑(2‑pyridyl)‑1,3,5‑triazine
ABBREVIATIONS