= Method 200.8 revision 5.4 by United States Environmental Protection Agency
{c}
{title2=1994}
https://nepis.epa.gov/Exe/ZyPURL.cgi?Dockey=P1017DGY.txt
1994, Determination of Trace Elements in Waters and Wastes by Inductively Coupled Plasma-Mass Spectrometry. Section3.2 defines calibration standards as dilutions of stock standard solutions used to relate instrument response to analyte concentration; §7.4 gives calibration-standard preparation. Official original method, not a claim about current regulatory approval.
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