Marking samples

Fig. 23.4. Mineral saturation indices (log Q/K) over the course of simulating the reheating of a hypothetical geothermal fluid. Bold lines show indices for minerals assumed to be present in the initial formation fine lines show values for other minerals. Dashed line marks sampling temperature (250 °C).

Take a 100 ml marked sample bottle for acidified sample and rinse the bottle twice with filtered sample wa-... 

Fill the bottle up to its neck with filtered water (change filter if needed) and close it tightly. Note that the filtered sample water should go straight into the bottle without contact with your hands -Take 60 ml marked sample bottle for DOC sample and rinse it twice with filtered sample water -Fill the DOC sample bottle up to its neck with filtered water (change filter if needed) and close the bottle tightly. 

Procedure. Mud Analyses. Sample Collection. Using bottom sampler, take samples by scraping off top inch of mud along three radii, 120° apart, and composite to make at least a 1-quart sample after free water is decanted. Mark sampling points on outside of tank to prevent resampling of same radii. 

Figure 12.6. Time-series plot of DOC concentrations in different hydrologic compartments of the two sites. Results are plotted within the same 12-month period only for illustrative purposes. Campina water was acmally monitored during the year following monitoring at Barro Branco. The annual occurrence of rainy and dry seasons is shown. Crosses mark sample dates. From McClain et al.(1997).

Figure 4 shows the changes in the imide band on hydrolysis for samples of two polymers, BTDA-ODA and PMDA-ODA. The samples of BTDA-ODA underwent a rapid decrease in the imide band during the first 24-48 h of hydrolysis. The reaction then slowed markedly. Samples cured to only 300 °C have a very slightly lower initial imide content and appear to hydrolyze somewhat more rapidly than those cured to 4000 C. However, as can be seen in Table II, the percentages of imide remaining after 600 h hydrolysis, based on the final vs initial imide ratios, are the same within experimental error. 

FIGURE 7.12 X-ray powder diffraction patterns of a soil clay fraction untreated (top) and treated (bottom) with dithionite-citrate-bicarbonate attack, which removes all secondary Fe oxides Cn = a-AljOj (corundum) Gt = goethite Hm = hematite PS = phyllosilicates and Qz = quartz. Hematite identification is uncertain because of strong overlap with phyllosili-cate and goethite peaks, hence the question marks. Samples contained a-Al203 as an internal standard. (Reprinted from Schulze, D. G., Clays Clay Miner. 34, 6, 681-685, 1986. With permission from the Clay Minerals Society.)... 

A multiple purpose template, made of perspex, for marking, sample apphcation and evaluation of the chromatograms (Fig. 19). 

Fig. 3. Sampling p>oint inside the church (red mark sample 1 yellow mark sample 2 green mark sample 3)...

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