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There are currently no known outstanding effects for the The Natural Mineral Water, Spring Water and Bottled Drinking Water (England) Regulations 2007, Paragraph 20.
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20.—(1) For the purpose of paragraph 17(a), until the end of 31st December 2019, a method of analysis for a parameter specified in the first column of the table in Section 3 (alternative minimum performance characteristics for a method of analysis that may be used until the end of 31st December 2019) is a method of analysis that complies with minimum performance characteristics if it is a method of analysis that—
(a)is capable of measuring parametric concentrations with a trueness not less than the percentage of the parametric concentration specified in the second column of the table,
(b)is capable of measuring parametric concentrations with a precision not less than the percentage of the parametric concentration specified in the third column of the table,
(c)has a limit of detection that does not exceed the percentage of the parametric concentration specified in fourth column of the table, and
(d)in the case of cyanide, complies with the requirement specified in the fifth column of the table.
(2) For the purpose of sub-paragraph (1)(b) and the table in Section 3, “precision” (the random error) is twice the relative standard deviation (within a batch and between batches) of the spread of results from the mean as further described in ISO 5725-1:1994(en) entitled “Accuracy (trueness and precision) of measurement methods and results – Part 1: General principles and definitions” published by the International Organization for Standardization on 22nd December 1994, as amended by ISO 5725-1:1994/Cor 1:1998 entitled “Accuracy (trueness and precision) of measurement methods and results – Part 1: General principles and definitions TECHNICAL CORRIGENDUM 1” published by the International Organization for Standardization on 2nd May 1998.
(3) For the purpose of subparagraph (1)(c) and the table in Section 3, the limit of detection is—
(a)three times the standard deviation within a batch of a natural sample containing a low concentration of the parameter, or
(b)five times the standard deviation of a blank sample within a batch.]
Textual Amendments
F1Sch. 12 inserted (6.4.2018) by The Natural Mineral Water, Spring Water and Bottled Drinking Water (England) (Amendment) Regulations 2018 (S.I. 2018/352), reg. 1(1), Sch. 2
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