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 laboratory) taken to the site and returned to the laboratory unopened. The trip blank as well a...
Wed, 19 Dec, 2018 at 12:55 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