GB/T 13885-2017 Translated English of Chinese Standard (GB/T 13885-2017, GBT13885-2017): Determination of the contents of calcium, copper, iron, magnesium, manganese, potassium, sodium and zinc in feeds -- Method using atomic absorption spectrometry [Buy--download True-PDF in 3-second: https://play.google.com/books > Sign in > This BOOK > "3-dots" > Export > Save as "*.pdf"]https://www.chinesestandard.net, 13 feb 2023 - 22 pagine This document specifies the method that uses atomic absorption spectrometry to determine the contents of calcium (Ca), copper (Cu), iron (Fe), magnesium (Mg), manganese (Mn), potassium (K), sodium (Na) and zinc (Zn) in feeds. This Standard is applicable to the determination of the contents of calcium (Ca), copper (Cu), iron (Fe), magnesium (Mg), manganese (Mn), potassium (K), sodium (Na) and zinc (Zn) in compound feeds, concentrate feeds, concentrate supplements, additive premixes and feed ingredients. The detection limit of each element content of this method is: K, Na: 500mg/kg; Ca, Mg: 50mg/kg; Cu, Fe, Mn, Zn: 5mg/kg. |
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1L of water 5mL of cesium 5mL of hydrochloric 5mL of lanthanum acid solution 4.3 Animal feeding stuffs Annex ashing atomic absorption spectrometry atomic absorption spectrophotometer available standard solutions background correction blank solution 8.5 carbon dioxide carbon particles cesium chloride solution chapter numbers coefficient of variation concentration of elements containing organic matter contents of calcium copper determination results Element Content evaporate to dryness heating plate high temperature resistance hydrochloric acid solution lanthanum nitrate solution lanthanum/cesium blank solution magnesium manganese Measure the absorbance Measurement conditions Adjust Method using atomic milliliter mixed compound Mn and Zn Normative references NOTE potassium premix containing organic repeatability limit Replace ISO reproducibility limit result calculation Result statistics Sample Parameter set the volume sodium and zinc solution and 5mL specimen Standard and ISO standard curve Standard stock stock solution Subtract the absorbance sulfate Table C.1 technical differences temperature resistance furnace test material solution volume constant water to dilute