Sample nomenclature

Sample Nomenclature, This is illustrated in Table I. The loading of the glassy component(TEOS) is expressed in percentage of the total weight of glassy and oligomeric components used. 

Hg. 2. Sample nomenclature Reprinted by permission of John Wiley Sons, Inc, from G. Kateman and F. W. Pijpers, Quality Control in Analytical Chemistry", p. 20, 1981. Copyright 1981 John Wiley Sons Inc... 

The lUPAC nomenclature for the sampling process is illustrated in Figure 5. This links with the sampling nomenclature diagram on Page 8 (Figure 3). 

Experiments have been carried out on essentially monodisperse polystyrene, either homopolymers (normal or deuterated) or isotopically-labelled block-copolymers. These materials have been used alone or blended. Sample nomenclature and average molecular weights, as determined by SEC, are presented in Tables 1 and 2. Isotopically-labelled block copolymers, either linear or 6-arm stars, synthesized by anionic polymerization, were kindly provided by Dr. L. J. Fetters (Exxon Research and Engineering Company). 

Figure 3. Effect of acid catalyst (HCl) content on the temperature dependence of the dynamic mechanical parameter tan 8 for a series of TEOS(48)-PDMS(1700)-50-X-80C materials. See text for sample nomenclature. (Reproduced from reference 4. Copyright 1987 American Chemical Society.)...

As one example. Figure 3 shows the ratio of loss to storage modulus (tan 8) in the dynamic mechanical spectra of a series of materials made with a silanol-terminated PDMS (weight-average molecular weight [M ] 1700) and TEOS as a function of acid catalyst content. [With regard to the sample nomenclature used in Figure 3, TEOS(48)-PDMS(1700)-50-0.045-80C indicates that the material was prepared with 48 wt % of TEOS, 52 wt % of... 

Figure 6. Effect of molecular weight of PTMO oligomer on the SAXS profiles of a TEOS(60)-PTMO(X)-100-0.04-RT system. RT is room temperature. See text for sample nomenclature.

Figure 9. XAFS spectra (a,c) and Fourier transforms (FTs b,d) of As(V) and As(IIl) sorbed to various HAO and aluminosilicate clay phases. Sample nomenclature is as follows AS and A3" = As(V) amd As(III), respectively "ppt. = coprecpitate with amorphous HAO G" = gibbsite K" = kaolinite "fV" = smectite 1" or 01" = concentration of 0.1 or 0.0 MNaNOj or NaCl, respectively LT" = cryogenic data collection conditions (10-50 K) RT" = ambient data collection conditions. Peak positions in FTs are not corrected for phase-shift effects, and are therefore approximately 0.5 A shorter than the true distance. From Foster (1999).

Figure 5.2 XRD patterns of modified clay particles and natural montmorillonite clay particles (Na-MMT). See text for sample nomenclature. Reproduced with permission from [46].

Figure 5.3 TGA scans for Na-MMT, modified clay particles, and BAPS monomers at a heating rate of 10 °C/min under nitrogen (see text for sample nomenclature). Reproduced with permission from...

Figure 5.6 XRD patterns of the blends containing 10 wt% Clay B prepared from NMP 1 -OI-3/Clay B 2 - OI-2/Clay B 3 - OI-3/Clay B 4 - 01-0/ Clay B. See text for sample nomenclature. Reproduced...

One other very important attribute of photoemitted electrons is the dependence of their kinetic energy on chemical environment of the atom from which they originate. This feature of the photoemission process is called the chemical shift of and is the basis for chemical information about the sample. In fact, this feature of the xps experiment, first observed by Siegbahn in 1958 for a copper oxide ovedayer on a copper surface, led to his original nomenclature for this technique of electron spectroscopy for chemical analysis or esca. 

Just as we did for PCR, we must determine the optimum number of PLS factors (rank) to use for this calibration. Since we have validation samples which were held in reserve, we can examine the Predicted Residual Error Sum of Squares (PRESS) for an independent validation set as a function of the number of PLS factors used for the prediction. Figure 54 contains plots of the PRESS values we get when we use the calibrations generated with training sets A1 and A2 to predict the concentrations in the validation set A3. We plot PRESS as a function of the rank (number of factors) used for the calibration. Using our system of nomenclature, the PRESS values obtained by using the calibrations from A1 to predict A3 are named PLSPRESS13. The PRESS values obtained by using the calibrations from A2 to predict the concentrations in A3... 

The nomenclature used for the catalyst samples in this study is following ... 

Each simulation example is identified by a file name and title, and each comprises the qualitative physical description with drawing, the model equation development, the nomenclature, the ISIM program, suggested exercises, sample graphical results and literature references. The diskette in the pocket at the back of the book contains the programs and the ISIM software. 

Horwitz W (1990) IUPAC, Analytical Chemistry Division, Commission on Analytical Nomenclature Nomenclature for sampling in analytical chemistry (Recommendations 1990), Pure Appl Chem 62 1193... 

A study of the nomenclature problem indicates that only samples are analyzed elements, ions, and compounds are identified or determined. The difficulty occurs when the sample is nominally an element or compound (of unknown purity). Analysis of... (an element or compound) must be understood to mean the identification or determination of impurities. When the intent is to determine how much of such a sample is the material indicated by the name, assay is the proper word. ... 

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