SVCCS-GALANT Sample Clauses

SVCCS-GALANT. The NANoREG partner SINTEF has characterized the TiO2 using bright-field (BF) TEM of NPs on lacey carbon (Figure 3) and DLS analysis of the TiO2 NP solution (Figure 4). It concluded that the synthesis of the TiO2 NPs was successful, since it generated comparable TiO2 NP solutions with similar particle sizes. However, the TiO2 NPs size distribution appears to be very dependent upon storage time (from day 0 to day 30). It is also recommended to maintain consistent TiO2 NP particle sizes by controlling accurately the synthesis and analysis/application processes. Figure 4: DLS analysis of the TiO2 NP solution showing the hydrodynamic size of the particles. The DLS analysis of the pure titanium iso-propoxide reagent solution indicated particulate responses at similar size ranges to those seen in the TiO2 NPs. As shown in fig. 5, similar size averages have definitely some significant differences, especially at the lower peak around 1-5 nm. Furthermore at very low particle concentration the instrument gave many error messages. Figure 6: TiO2 leaching Studies - test materials Table 1: sample matrix for the TiO2 leaching study The used glass containers were prepared differently (not coated, coated with TiO2-denatured ethanol, or coated with TiO2-absolute ethanol; see figure 6 above), and subsequently shaken, washed, or treated with some combinations of these procedures (Table 1 above) and subsequently investigated for TiO2 leaching. The results are presented in Table 2 below. Here different fractions were analysed, such as the supernatant with dissolved Ti, the precipitate with particulate Ti, and both dissolved and particulate Ti in the bottle. Table 2: TiO2 quantification in supernatant, precipitate and both dissolved + particulate material Sample Ti (mg/L) Supernatant ('dissolved Ti') Pure ICP grade water 0.00 Blank A 0.00 0.00 0.00 0.00 0.00 0.00 Blank B 0.00 0.00 0.00 0.00 0.00 0.00 Blank C 0.00 0.00 0.00 0.00 0.00 0.00 Bottle 1 0.00 0.10 0.17 0.15 0.24 0.36 Bottle 2 0.01 0.12 0.12 0.19 0.23 0.23 Bottle 3 0.00 0.29 0.23 0.18 0.26 0.29 Bottle 7 0.00 n/a 0.32 0.24 0.37 2.96 Bottle 8 0.45 10.47 12.74 10.38 10.29 9.52 Bottle 9 0.00 0.11 0.06 0.04 0.05 0.12 Precipitate ('particulate Ti') Pure ICP grade water 0.13 Blank A 0.23 0.15 0.10 0.05 0.03 0.04 Blank B 0.26 0.14 0.07 0.05 0.02 0.01 Blank C 0.25 0.14 0.08 0.05 0.03 0.03 Bottle 1 0.24 0.22 0.28 0.25 0.31 0.44 Bottle 2 0.49 0.28 0.30 0.32 0.34 0.41 Bottle 3 0.22 0.44 0.77 1.04 1.32 1.72 Bottle 7 0.23 4.30 9.91 2...