Data Quality - QA/QC
Method Blank A method blank is a laboratory control sample that is free of the target parameters and any substances that may interfere with that analysi...
Wed, 19 Dec, 2018 at 7:58 AM
Blank Spike A laboratory control sample free of the target analytes or interference, is fortified with a known concentration of all or selected target anal...
Mon, 4 Apr, 2022 at 2:44 PM
Matrix Spike A second aliquot from a randomly chosen sample is fortified with a known concentration of target analytes. The sample is processed through the...
Tue, 7 May, 2019 at 2:04 PM
Laboratory Duplicates A second aliquot from a randomly chosen sample within an analytical batch processed through the entire analytical method. Laborat...
Tue, 7 May, 2019 at 2:09 PM
Laboratory Reference Samples Purchased or prepared samples that have been certified by a recognized agency to contain specified levels of selected constitu...
Thu, 20 Dec, 2018 at 7:51 AM
Surrogate Recovery Surrogates are deuterated analogues or compounds not normally found in nature but have chemical and physical behaviour similar to the an...
Tue, 7 May, 2019 at 2:09 PM
One of the most commonly used estimates of precision is the relative percent difference or RPD between two samples. In typical sampling situations a second...
Tue, 18 Dec, 2018 at 10:59 AM
A Blind Duplicate is a second sample collected at the same time and location, under the same conditions and submitted in separate containers. Samples ar...
Wed, 19 Dec, 2018 at 8:00 AM
Trip Blank - a sample of analyte free media supplied by the analyzing laboratory taken to the site and returned to the laboratory unopened. The trip bla...
Fri, 17 Jan, 2025 at 1:20 PM
Matrix interference could include compounds directly affecting instrument sensitivity. It could also be target or non-target compounds masking the signal o...
Tue, 7 May, 2019 at 12:05 PM