During urine collection, participants ingested tablets of 80 mg para-aminobenzoic acid three times per d (240 mg/d). Before analysis, weight and density of the collected urine were measured to calculate the volume. Excretion of urinary Ca was measured using photometric analysis (ABX Pentra 400 analyser; HORIBA ABX S.A.S.) and urinary N using the modified Dumas method with a VarioMax CN analyser (Elementar).
Vario max cn analyser
Manufactured by Elementar
Sourced in Germany
The Vario Max CN analyser is a laboratory instrument designed for the determination of carbon and nitrogen content in a wide range of sample types. It operates on the principle of elemental analysis, providing accurate and reliable results. The Vario Max CN analyser is a versatile and precise tool for analytical applications that require the quantification of carbon and nitrogen.
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Lab products found in correlation
3 protocols using vario max cn analyser
1
Urinary Excretion of Calcium and Nitrogen
2
Soil Sample Analysis Protocol
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For air-dry soil samples, the following analyses were made:
the content of total organic carbon (TOC) and total nitrogen (Nt). The content of organic carbon and total nitrogen were assayed with the Vario Max CN analyser provided by Elementar (Germany). The content of TOC and the content of Nt were expressed in g kg -1 of d.w. of soil 40 (link) ;
-pHin the suspension of distilled water and soil with the pH-meter MultiCal pH 540 GLP WTW 41 ; grain size composition was determined applying the aerometric method 42 (link) ;
the content of total organic carbon (TOC) and total nitrogen (Nt). The content of organic carbon and total nitrogen were assayed with the Vario Max CN analyser provided by Elementar (Germany). The content of TOC and the content of Nt were expressed in g kg -1 of d.w. of soil 40 (link) ;
-pHin the suspension of distilled water and soil with the pH-meter MultiCal pH 540 GLP WTW 41 ; grain size composition was determined applying the aerometric method 42 (link) ;
3
Comprehensive Soil Characterization Protocol
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The collected soil samples were dried and sieved through a 2-mm mesh. In the soil samples (tree replication) the following were determined: particle size composition; pH in 1 M KCl; content of TOC, TN, DOC, and DON. The particle size distribution was determined using a Mastersizer 2000 laser diffraction particle size analyser (Malvern Instrument, Malvern, UK). Values of pH were measured potentiometrically in 1 M KCl solution (soil:solution ratio of 1:2.5 w/v) using a pH-meter. The contents of total organic carbon (TOC) and total nitrogen (TN) were assayed with a Vario Max CN analyser from Elementar (Langenselbold, Germany). The content of dissolved organic carbon (DOC) was assayed in soil solutions from extracting the soil of 0.004 mol dm -3 CaCl 2 . The content of DOC was determined with a Multi N/C 3100 Analityk Jena (Jena, Germany) analyser.
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