In addition to control samples (DNA+EtBr), test samples (DNA+EtBr+test compounds), blank 1 (EtBr only), blank 2 (DNA only), wells containing DNA and compound were also prepared to test any change in the background fluorescence readings.
In this research, the micro compound blanking and deep drawing of copper sheet is conducted.
The combination of all compounds (blank + DP in combination) showed a higher inhibitory effect than the aggregate value of individually added products (48 h data).
Figure 3 Representative LC-MS chromatograms of marker compounds and solvent blank used in analysis (A) Extracted Compound Chromatogram of marker compounds (B) MFE spectrum of markers indicating the m/z ratios (C) Base peak chromatogram of methanol used as solvent (D) TIC overlay spectra of markers compounds.
In our study, the background contamination (i.e. compounds present in analytical blank samples) as well as compounds present in adjacent, non-active fractions was subtracted from the active fraction result list.
The blank values of those compounds are small compared to the amount of those gases in indoor air with a sample size of more than 5 liter.
Laboratory blank concentrations of organic compounds were very low, and show that contamination associated with laboratory methods, for example, extraction and rotoevaporation, was negligible.
MS was operated in scan mode (50 550 m/ z) for qualitative analysis, testing the method specificity, screening of blanks, and confirmation of compound identity.
As laboratory blank concentrations of organic compounds were very low, the phthalate esters represent contamination of the coal prior to processing in the laboratory.
A blank control with all compounds except OAS was maintained, and the linearity of the assay was checked with 2.5 and 10 μL of added crude leaf extract.
