Division
United Kingdom
The Horwitz equationf1 (for concentrations 1,2 × 10– 7 ≤ C ≤ 0,138) and the modified Horwitz equationf2 (for concentrations C < 1,2 × 10– 7) are generalised precision equations which are independent of analyte and matrix but solely dependent on concentration for most routine methods of analysis.
Annotations
Footnotes
- f1
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W. Horwitz, L.R. Kamps. K.W. Boyer, J.Assoc.Off.Analy.Chem.,1980, 63, 1344.
- f2
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M. Thompson, Analyst, 2000, 125, 385-386.
Notes on Division C.3.3.1
Textual amendments
- F1
Words in Annex para. C omitted (31.12.2020) by virtue of The Contaminants in Food (Amendment) (EU Exit) Regulations 2019 (S.I. 2019/639), regs. 1, 35(d) (as substituted by S.I. 2020/1504, regs. 1(2), 8(11)); 2020 c. 1, Sch. 5 para. 1(1)