Sentence examples for at spike levels from inspiring English sources

At spike levels of 530 and 53 ng/g hydrazine, the mean recoveries from all tobacco product types were within the acceptable range [29] of 70%110%% (Table 1), indicating satisfactory accuracy.

The developed method has been applied in the analysis of AgNPs in river, lake and wastewater samples, with excellent extraction efficiencies (84.9‒98.8%) for AgNPs at spiking levels of 0.86 and 8.70 μg/L.

For palm kernel meal the sensitivity at spiking levels 10 100 cfu and 100 1000 cfu was in the range 14 57% for all three methods.

The standard accuracies (93 118%) were obtained at three spike levels [LOD, 1.25 ng/mL (6.6 ng/mL for PFOS) and 12.5 ng/mL (50 ng/mL for PFOS)] (Kuklenyik et al. 2005).

With the %RSD below 20%, the precision of the analytical technique was satisfactory at all three spike levels.

Before extraction a selected number of PBDE congeners were added, BDE-47, BDE-99, BDE-100, BDE-153, BDE-154 and BDE-209 at two different spike levels (0.1 ng/sample and 1 ng/sample) both in triplicates.

Analyte recoveries are usually lower at lower analyte spike levels, particularly approaching the LOD, and this aspect of the method should be assessed in case global recovery adjustments are needed.

The spiked samples were prepared at 16, 32, 65, and 125 MLD50; 2 samples were run in duplicate at each spike level giving a total of 4 measurements.

Though barred under secrecy regulations from discussing much of what was in the reports, she said that there had been "an extraordinary spike" of intelligence warning about Qaeda attacks in the Daily Brief during 2001 and that "it plateaued at a spike level for months".

Reproducibility at low spike level ranged from 0.6 to 0.9 μg/kg and from 8.7 to 14.5 μg/kg at high spike level.

At the spike level of 26.5 ng/g hydrazine, a low recovery of 64% was observed for Stonewall Wintergreen.