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e-CFR data is current as of August 4, 2020

Title 7Subtitle BChapter ISubchapter EPart 90Subpart D → §90.103

Title 7: Agriculture
Subpart D—Quality Assurance

§90.103   Maintenance of quality control records.

Quality control records pertaining, but not limited to the following areas, shall be retained by the laboratory for at least the 3 most recent years:

(a) Prepared solution standardizations;

(b) Recovery studies by known analyte additions;

(c) The purity checks of reagents and test materials;

(d) Apparatus and equipment calibrations;

(e) The quality examination and testing of materials;

(f) The mandatory participation in proficiency check sample testing or collaborative studies;

(g) Daily critical parameter checks of equipment, such as temperature readings;

(h) The equivalency tests of new procedures with standard methodologies.

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