Ammonium was determined colorimetrically using a modified orthophatal-dialdehyde assay45 (link) (detection limit 10 µM) and nitrite (≥5 µM) by the sulfanilamide reaction46 . Nitrate (≥1 µM) was measured by converting it into nitric oxide at 95°C using a saturated solution of VCl3 in HCl. Nitric oxide was than measured using a Nitric Oxide Analyser (NOA280i, GE Analytical Instruments, Manchester, UK). To determine the total organic carbon (TOC) concentration of the medium, medium was first acidified to remove inorganic carbon. After 6.5x dilution with ultrapure water, samples were measured using a TOC-L CPH/CPN analyser (Shimadzu, Duisburg, Germany).
Toc l cph cpn analyser
Manufactured by Shimadzu
Sourced in Germany
The TOC-L CPH/CPN analyser is a laboratory instrument designed to measure the Total Organic Carbon (TOC) content in liquid samples. It provides accurate and reliable analysis of TOC levels, which is important for environmental monitoring, process control, and water quality assessment.
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Lab products found in correlation
4 protocols using toc l cph cpn analyser
1
Quantification of Nitrogen Species and TOC
2
Quantification of Nitrogen Species and TOC
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Ammonium was determined colorimetrically using a modified orthophatal-dialdehyde assay45 (link) (detection limit 10 µM) and nitrite (≥5 µM) by the sulfanilamide reaction46 . Nitrate (≥1 µM) was measured by converting it into nitric oxide at 95°C using a saturated solution of VCl3 in HCl. Nitric oxide was than measured using a Nitric Oxide Analyser (NOA280i, GE Analytical Instruments, Manchester, UK). To determine the total organic carbon (TOC) concentration of the medium, medium was first acidified to remove inorganic carbon. After 6.5x dilution with ultrapure water, samples were measured using a TOC-L CPH/CPN analyser (Shimadzu, Duisburg, Germany).
3
Water Quality Analysis Methods
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Concentrations of NH4+, NOx- and PO43- in the filtered water samples were measured colorimetrically on an auto analyser (III, Seal Analytical, Norderstedt, Germany). NH4+ was determined using the Berthelot reaction (adapted NEN-EN-ISO 11732:2005), PO43- using an adapted ISO 15681–2:2003, and NOx- according to an adapted version of NEN-EN-ISO 13395:1997. Total dissolved phosphorus (DP) and trace elements were measured in filtered acidified water (0.1 ml 10% nitric-acid) on an ICP-OES with a radial plasma observation, a V groove nebulizer and a cyclonic spray chamber (iCap 6300, Thermo Fisher Scientific, Bremen, Germany). DOC and DN concentrations were measured in rhizon-filtered samples on a total organic carbon analyser, using combustion catalytic oxidation at 680°C (TOC-L CPH/CPN analyser, Shimadzu). Each DOC and DN sample was measured twice.
4
Analytical Characterization of Pharmaceuticals
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The concentration of the pharmaceuticals was determined by a liquid chromatography apparatus (UPLC Shimadzu) with a column C18 (5 μm; 4.6 × 150 mm). An isocratic method set at a flow rate of 1.0 ml.min -1 . The injected volume was equal to 20 μL. The separation was obtained using a mixture of water (with 0.1% acetic acid)/acetonitrile in a ratio of 25:75 for the analysis. The detection of pharmaceuticals was performed using an absorption wavelength of 283 nm. Before injection, the samples were filtered through 0.2 μm filters of 25 mm diameter.
LC/MS studies were carried out with a Dionex Chromatography system coupled to a TSQ Endura™ Triple Quadrupole Mass Spectrometer equipped with a pneumatically assisted electrospray ionisation source (ESI). Total organic carbon (TOC) was analysed by direct injection of the collected samples into a Shimadzu TOC-L CPH/CPN analyser calibrated with standard solutions of hydrogen potassium phthalate.
LC/MS studies were carried out with a Dionex Chromatography system coupled to a TSQ Endura™ Triple Quadrupole Mass Spectrometer equipped with a pneumatically assisted electrospray ionisation source (ESI). Total organic carbon (TOC) was analysed by direct injection of the collected samples into a Shimadzu TOC-L CPH/CPN analyser calibrated with standard solutions of hydrogen potassium phthalate.
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