Referencing, internal

Proton-decoupled 13C-NMR spectra were recorded on a Varian XL-300 operating at 75.4 MHz. Approximately 250 mg of the sample was dissolved in 3 ml of deuterated chloroform. 13C chemical shifts were referenced internally to CDCL (77 ppm). A delay of 200s was used to ensure relaxation of all the carbon nuclei and 1000 transients were collected to assure a good signal-to-noise ratio. 

The standard used in North America (and most commonly referenced internationally) is the ASME Boiler and Pressure Vessel Code (the ASME BPV Code). The 12 sections of the ASME BPV Code are listed in Table 13.1. Most chemical plant and refinery vessels fall within the scope of Section VIII of the ASME BPV Code. Section VIII contains three subdivisions ... 

Purified pigmented tannin (100 mg/mL, 1 1 acetone-d6 D20) was characterized by C-NMR (100 MHz, Bruker DPX400), with chemical shifts (5) in ppm referenced internally with acetone-d6. The proton-decoupled, inversegated sequence, with 30° pulse length, 25,000 Hz spectral widA, 64 K data points, 1.3 s acquisition time, relaxation delay of 3 ms, SO K scans and with 3 Hz line broadening was carried out at a temperature of300 K. 

Fig. 4,1. Coaxial assembly in an NMR cell with an external referencing-internal lock configuration...

Chemical shifts referenced internally to CDOj (77 ppm). Unambiguous assignment not determined. 

A standardization is still possible if the analyte s signal is referenced to a signal generated by another species that has been added at a fixed concentration to all samples and standards. The added species, which must be different from the analyte, is called an internal standard. 

Assigned by H-C correlation spectroscopy. Referenced to internal t-BuOH (30.695 ppm). Referenced to external Me4Si. 

Measured ar 400 MHz in D20 referenced to internal r-BuOH (1.203 ppm.) Assignments for glucosyl residues. 

Measured at 50.3 MHz in chloroform-rf-referenced to the central peak of the chloroform- triplet (76.9 ppm). eMeasured in chloroform- at 75.5 MHz, referenced to internal Me4Si. 

Pd removal was determined as follows. An aliquot of a representative liquid or solid sample was accurately weighed and subsequently digested by refluxing in nitric and/or hydrochloric acid using a closed vessel microwave procedure (CEM MARS5 Xpress or Milestone Ethos EZ). Cooled, digested samples were diluted, matrix matched to standards, and referenced to a linear calibration curve for quantitation an internal standard was employed to improve quantitation. All samples were analyzed by an Inductively Coupled Plasma Mass Spectrometer or ICP/MS (Perkin Elmer SCIEX Elan DRCII) operated in the standard mode. 

International Critical Tables (1933) is still probably the most comprehensive compilation of physical properties, and is available in most reference libraries. Though it was first published in 1933, physical properties do not change, except in as much as experimental techniques improve, and ICT is still a useful source of engineering data. ICT is now available as an ebook and can be referenced on the Internet through Knovel (2003). 

Spectroscopic Analysis. Infrared (IR) spectroscopic analysis was performed on a Beckman Microlab 620 MX computing spectrometer. Samples were cast on a sodium chloride pellet or made into a pellet with potassium bromide. and 13C NMR spectra were obtained using a JEOL HNM-FX 270 MHz Fourier transform NMR spectrometer. Samples were dissolved in deuterium chloroform and chemical shifts were referenced to an internal standard of tetramethylsilane. 

The proton NMR spectrum of miconazole nitrate was obtained using a Bruker Instrument operating at 300, 400, or 500 MHz. Standard Bruker Software was used to execute the recording of DEPT, COSY, and HETCOR spectra. The sample was dissolved in DMSO-d6 and all resonance bands were referenced to the tetramethyl-silane (TMS) internal standard. The 1H NMR spectra of miconazole nitrate are shown in Figs. 5-7 and the COSY 1H NMR spectrum is shown in Fig. 8. The H NMR assignments for miconazole nitrate are provided in Table 3. 

Fig. 5 shows the instrumental arrangement of the commercially most successful optical chemical sensor between 1984 and 2000. It is used in about 70% of all critical care operations in the US to monitor pH, pC02 and p02 in the cardiopulmonary bypass operations35. It contains 3 fluorescent spots, each sensitive for one parameter, in contact with blood. Fluorescence intensity is measured at two wavelengths and the signals are then submitted to internal referencing and data processing. 

A number of promising C02 sensors have been described13,33. The phase-fluorometric system employing dual luminophore referencing, which is rather complex (two dyes, internal buffer system, sol-gel polymer matrix), has demonstrated satisfactory working characteristics33. But it still has to prove its safety and cost-effectiveness, and requires extensive validation with real food samples. 

You may have included some other documents with the SOPs and WIs because they are also held in your area of the laboratory. These could be, for example, guides for carrying out particular activities, such as method validation, and international guidelines on how to achieve reliable results. Some areas of activity may be covered by legislation copies of the relevant documents will be kept locally as it may be referenced in the SOP. Equipment manuals are also kept locally. 

Chapter 21 contains four indices to allow easy access to specific agents in this handbook. These indices are the Alphabetical Index of names, the Chemical Abstract Service (CAS) numbers index, the International Classification of Diseases (ICD-10) numbers index, and the Organization for the Prohibition of Chemical Weapons (OPCW) agent numbers index. These indices contain synonyms and identifying numbers for the agents in this handbook that are cross-referenced to the individual agents via the handbook number. 

Purchase or specification of a fire pump to support hydrocarbon operations should be in compliance with recognized international standards for such equipment. The most commonly referenced standards are listed below. All of these standards require a factory acceptance test of the unit. 

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