Sentence examples for standards and concentrations from inspiring English sources

A 4PL curve was used to plot the standards, and concentrations of samples were interpolated from the linear portion of the curve.

A standard curve (0.25 25 ng/ml) was constructed by plotting absorbance values against concentrations of standards, and concentrations of unknown samples were determined using this standard curve.

In most cases, polyphenol contents of foods before and after processing were determined by high-performance liquid chromatography (HPLC) where identities could be verified with reference to authentic standards, and concentrations could be reliably calculated from chromatographic peak areas.

Sample fatty acids were identified using external lipid standards, and concentrations were determined with reference to the internal standard (C21 fatty acid) concentration, expressed on a mass basis for each sample.

Compounds were detected with a Shimadzu RF 10-AXL fluorometer, with excitation and emission wavelengths of 285 and 345 nm, respectively, quantitated by comparing peak heights ratios (analyte/NMS) to those observed for standards, and concentrations expressed as ng per mL.

The amounts of internal standards and concentration range of calibration curves were selected using test heart tissues.

All other analytes are semi-quantitated with a single point standard and concentration linearity is assumed.

Position of 19S and 4.3S standards and sucrose concentrations are indicated.

These assignments were confirmed by comparison to prepared standards, and approximate concentrations were estimated using spectral deconvolution to estimate peak areas.

This corresponds to an electron affinity of about 4.2 eV at standard pressures and concentrations.

(Bio-Rad Laboratories, Inc., Hercules, CA 94547, USA) was used to acquire standard curves and concentrations.