Shimadzu TOC

A 1M aqueous amine solution was placed in a two-necked flask, through which CO2 was bubbled with stirring for 1 hour at a flow rate of 50 ml/min at 40 °C under 1 atm. After the end of COj bubbling, the solution was heated to 100 °C and kept at this temperature for an additional hour. The amount of CO remaining in the amine solutions at 40 °C and 100 °C was determined by an apparatus SHIMADZU TOC-10B and was shown here as the loading capacity in mol COg/mol amine (%). Similar determinations of CO2 loadings were made under a CO2 partial pressure of... 

Analyses of inorganic and organic carbon were made on dry sediment samples by combustion on a Shimadzu TOC-5000 total organic carbon analyzer equipped with a solid sample module SSM-5000A. 

The Shimadzu TOC-500 TOC analyser is a fully automated system capable of determining between 1 and 3000 pg/1 TOC. 

A.E.J. Miller, R.F.C. Mantoura, and M.R. Preston. Shipboard investigation of DOC in the northeast Atlantic using platinum-based catalysts in a Shimadzu TOC-500 HTCO analyzer. Mar. Chem., 41 215-221, 1993. 

The experiments were performed with different concentration of p-coumaric acid. While in most cases, 500 ppm solutions were employed, saturated p-coumaric acid solutions (700ppm) were more suitable for detecting minor intermediates, p-coumaric acid and intermediates compounds evolution was monitored by HPLC equipped with a Yarian OmniSpher 5 Cig column. Identification and quantitations were achieved by comparison with standards. TOC analyses were carried out using a Shimadzu mod 5000 A apparatus. 

Total organic carbon—TOC-500 Shimadzu Corporation International Marketing Division Shinjuku Mitsui Building 1,1, Nishi Shinjuku 2 Chrome Shinjuku ku Tokyo 163 Japan... 

Detailed experimental procedures have been previously reported (Ko, 1998 Ko et al., 1998a,b) therefore, they are only briefly described here. Phenanthrene (Aldrich, 99.5+%), naphthalene (Aldrich, 99+%), SDS (Sigma, 99.5+%), and Tween 80 (Aldrich, no purity reported) were used as received selected physicochemical properties for these compounds are shown in Table 1. Kaolinite, a nonswelling 1 1 layer phyllosilicate clay and common constituent of many subsurface environments, was used as received from Sigma. Solution pH and ionic strength were adjusted as necessary with 0.5 M HC1 and/or 0.5 M NaOH and NaCl, respectively. Aqueous phenanthrene and naphthalene concentrations were quantified by fluorescence (PTI, Inc.) at the excitation/emission wavelengths of 250/364 and 278/322 nm, respectively. A total organic carbon (TOC) analyzer (Shimadzu Model 5050) was used to determine aqueous SDS concentrations and Tween 80 concentrations were determined by UV absorbance at 234 nm. 

The elemental composition (C, H, N) of the cell mass was measured in a Leco CHN-2000 analyzer (St. Joseph, MI), while the oxygen content was obtained by the difference after correction for ash. Total organic carbon (TOC) of fermentation medium at the beginning and end of fermentations was analyzed with a TOC analyzer (Shimadzu 5050A Kyoto, Japan) by the combustion technique with nondispersive infrared detection. 

For TOC determinations 2cm of the irradiated slurry was withdrawn from the photoreactor every 30 min and, after filtration over the Millipore filter, analyzed by a TOC Shimadzu analyzer. 

The analyses of aromatic components were performed on a 1525 Binary Waters HPLC with a dual absorbance detector using a Symmetry Cl 8 column and a mobile phase of methanol and water. Carboxylic acids analyses were performed using the same HPLC system with an Atlantis dC18 column and mobile phase. pH was monitored with a Coming 430 pH meter. For most experiments, the total organic carbon was also analyzed using a Shimadzu 5050 TOC analyzer equipped with a NDIR detector coupled with an autosampler ASI 5000. 

TOC All On-line, on-site Oxidation Photometry (measurement of CO2 by IR) Photometry (UV, Vis) Specific electrode Few seconds to few minutes 2-5% 0-50000 mg.L-1 ISO 8245, NF EN 1484, EPA 415.1, EPA 5310C LAR, ANAEL, Shimadzu, Seres, Apollo Instruments, Bran+Luebbe, Datalink, EFS LAC Instruments et systemes, WTW, Hach, Environment SA, Martec, Sick Maihak... 

The overall reaction rate can also be followed using a Total Organic Carbon Analyzer (e.g. Shimadzu 5050) with an autosampler ASI 5000. The TOC analysis is based on the oxidation of the sample in a combustion chamber heated at 680° using platinum as a catalyst. In this instrument, the total sample carbon (TC) and the total inorganic carbon (IC) content are measured using different analytical methods. Vials with... 

Runs were developed in the Photo-CREC-Water I (Chapter II) with a water recirculation of 1720 mL min . Initial MeB concentrations were varied in the 5-50-/rmole range during the experiments. Samples were analyzed at 664 nm using a PU8625 UVA IS spectrophotometer and Shimadzu 5050 TOC model. This allows to follow the disappearance of the model compound, the intermediate species and the total organic carbon. 

The TOC in the hquid samples was measured with a Shimadzu 5050 TOC analyzer after subtrachon of the inorganic carbon (1C) corrtribution from the total carbon (TC). Furthermore, the carbon rrrass balance in the hqttid phase cotrld be checked by corrrparing the TOC values with the total carbon concentrations in the hquid phase derived from the HPLC artalysis. 

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