Analytical Chemistry

Figure 9.44 Schematic COSY spectrum of a two coupled spins, denoted A and X. For convenience, the normal one-dimensional spectru ...

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Figure 9.45 Basic COSY spectrum of geraniol, in CDCl 3 at 500 MHz. The H-5, H- 6 coupling is shown. (ii) Heteronuclear chemical ...

Figure 9.46 The HETCOR spectrum of geraniol, in CDCl 3 at 500 MHz for^1 H and^ 125.7 for^13 C. doublets (cross-peaks) due to^13 ...

Figure 9.47 The INADEQUATE spectrum of geraniol in CD 3 COCD 3 at 75.6^ MHz for^13 C. Qualitative Analysis – The Identification ...

Figure 9.48 PMR spectrum of p-ethoxyacetanilide in CDCl 3. Spectrum obtained at a magnetic field of 1.4092 tesla^ and a radiofre ...

ethoxy group. The sharp singlet at δ2.1, integrating to 3 protons, is shown from tables to be due to an isolated methyl group at ...

Figure 9.49 PMR spectrum of divinyl-β, β'-thiodipropionate, conditions as Figure 9.48. ...

Figure 9.50 PMR spectrum of thymol, conditions as in Figure 9.48. ...

X-ray tomography as risks to the health of the patient are virtually eliminated and additional information on their medical cond ...

Sample Inlet System Volatile or volatilizable compounds may be introduced into the spectrometer via a pinhole aperture or molecu ...

sample is mixed with a solvent containing a low relative molecular mass compound to act as a matrix and which strongly absorbs r ...

Figure 9.51 (a) Schematic diagram of a mass spectrometer using a single magnetic analyser. (b) A quadrupole mass spectrometer. ( ...

Instruments are calibrated with substances of known relative molecular mass and very accurate mass measurements can be made with ...

Figure 9.52 (a) Main processes in tandem mass spectrometry (MS/MS). CID stands for collision-induced dissociation, as occurs whe ...

can be seen from spectrum A (a product ion scan) that m/z 107 is the most abundant product ion, which confirms the initial loss ...

Equation (9.28) shows that for ions carrying a single positive charge, the mass is directly proportional to the square of the ra ...

An aid to identification is the ability to determine the relative molecular mass (RMM) with a high degree of accuracy and to est ...

Figure 9.54 Mass spectra of tetrahydrocortisone. (a) EI; (b) CI; (c) FI. Table 9.10 Principle stable isotopes and relative abund ...

iodine (^127) I (^100) Calculated using 100 for the most common isotope. ...