Students Who Benefit from RTI
Kamps et al. (2007) compared the effects of English language learners (ELL) receiving
Tier 2 interventions to ELL students being taught using a balanced literacy approach to reading.
The study found students...
GC/MS chromatographs of the ethyl acetate extraction of methamphetamine are shown in Figures 4-11. Peaks at 2.5, 4.1, and 5.9 and 6.7 minutes indicate the presence of DMS, methamphetamine, and two unidentified peaks by GC-MS respectively and are...
MS analysis in Figure 8 contains ion fragment peaks at 149.0, 91.1, 74.1 (most intense) and 58.1 m/z corresponding to the GC peak at 5.9 minutes (1.48%), indicates unidentified peak A.
Figure 8: GC-MS spectra of ethyl acetate extraction of...
MS analysis in Figure 9 contains ion fragment peaks at 148.1, 117.1, 91.1 (most intense) and 56.1m/z corresponding to the GC peak at 6.7 minutes (5.45%), indicates unidentified peak B. Figure 10 illustrates the GC chromatographs of the extracted...
Figure 11: TIC chromatograph of ethyl acetate extraction of methamphetamine. GC peaks at 5.8 and 6.7 minutes correspond to unidentified impurity peaks A and B.