Sentence examples for spike method from inspiring English sources

The absolute matrix effect and extraction recovery were calculated as follows: Absolute matrix effect = (Mean peak area)set 2 ⁄ (Mean peak area)set 1. Extraction efficiency = (Mean peak area)set 3 ⁄ (Mean peak area)set 2. This post-extraction spike method proposed by Matuszewski et al. [11] provides a quantitative understanding of the level of matrix effect observed for specific analytes.

Hill et al. [ 2] reported a spike method against total RNA for normalizing hybridization data such that the sensitivities of individual arrays could be compared.

For example, Holstege et al. [ 1] described a spike method against total RNA, based on their finding that the yields of total RNA from wild type and mutant cells were very similar.

Fractionation may be corrected in one of three techniques: (1) internal and (2) external normalization, including double spike method; and (3) "standard-sample-standard bracketing"; consecutive measurements of the same ratio in a sample and standard.

In a virtual rerun of the fiasco from last year, workers were forced to use the old-fashioned "block-and-spike" method to manually set switches with mallets.

Dry spiking is the preferred application method for solid, uncoated TiO2 and Ag nanoparticles to ensure the effects are not dependent on the particle concentration used for spiking, even though the bioavailability is reduced by the dry spiking method.

After spiking 2.5 kg of soil with Ag nanoparticles using the dry spiking method and soil as the carrier, six samples were randomly collected at different locations from the spiked soil and the silver content was determined (Table6).

The value (back calculated) obtained from QC's nominal concentration were considered for assessing matrix effect whereas Post-extraction-spiking method was applied to note the matrix effects, in properly stored samples.

A concentration-dependent relationship was observed for the dry spiking method which was comparable with both matrices, but the differing standard deviations resulted in NOEC values of 50 mg/kg dm for spiked food and < 50 mg/kg dm for spiked soil.

Any external spiking method, including our Percellome method, is valid for high-quality RNA samples.

One of the disadvantages of the spiking method is the associated monetary cost and the time required to prepare synthetic standards, and alternatives to such methods are desirable.