Initially, this standard mixture was calibrated against a certified forensic analytical 6-component standard containing ethanol and acetaldehyde at 1 mg/ml each (Restek).
Milk samples evaluated by the refractometer were analyzed for total solids at a certified dairy analytical laboratory (Sierra Dairy Labs, Tulare, California, USA) by a mid-infrared method [ 15] using a spectrophotometer (Bently 150, Bently Instruments, Chaska, Minnesota, USA).
Emelko et al. (13) showed that even when using certified sampling and analytical protocols, enumeration of Cryptosporidium oocysts in drinking water can yield variable results due to two sources of uncertainty: (1) sampling error and (2) analytical recovery error.
Mr. McAllister has maintained that tests performed at his request by a state-certified laboratory, Long Island Analytical Laboratories of Holbrook, showed lethal levels of pesticides in the dead fish.
Laser induced breakdown spectroscopy (LIBS) has been evaluated for the determination of micronutrients (B, Cu, Fe, Mn and Zn) in pellets of plant materials, using NIST, BCR and GBW biological certified reference materials for analytical calibration.
Calibration standards of arsenic (1,000 μg L−1) were prepared for each analytical session using certified stock standard solution (Fluka Kamica, Bushs, Switzerland).
The usefulness of a certified reference material (CRM) for analytical method validation and quality control purposes is attributed mainly to its key properties, namely homogeneity and stability.
The method trueness was tested with analytical spikes and certified reference materials, with recoveries ranging from 71% to 112% for all of the examined mycotoxins.
The improved CPE pattern was coupled with flame atomic absorption spectrometry (FAAS) for the extraction and detection of trace lead in real and certified water samples with satisfactory analytical results.
