Geochemical Analysis of Water and Sediment

Geochemical data for the January and June samples have been reported in other publications9 (link)19 (link). For the August samples, the same analytical procedures were used for water and sediment geochemical analyses. Cation and anion concentrations were measured by using ion chromatography (Dionex DX-600, USA), and DOC and TN concentrations were measured on a multi N/C 2100S analyzer (Analytik Jena, Germany). Sediment samples for TOC and mineralogy measurements were dried and ground. TOC samples were treated with 1 N HCl overnight to remove carbonates and then washed to a neutral pH followed by analysis with the multi N/C 2100S analyzer. Samples for quantitative mineralogy were X-ray scanned from 2 to 70 degree two theta with Cu K-alpha radiation (40 kV, 35 mA).

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Wang S., Dong H., Hou W., Jiang H., Huang Q., Briggs B.R, & Huang L. (2014). Greater temporal changes of sediment microbial community than its waterborne counterpart in Tengchong hot springs, Yunnan Province, China. Scientific Reports, 4, 7479.

Publication 2014

DX-600 multi N/C 2100S analyzer

Alpha radiation Anion Carbonates Chromatography X ray

Corresponding Organization :

Other organizations : China University of Geosciences (Beijing), China University of Geosciences, Miami University

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Variable analysis

independent variables

Sampling time (January, June, August)

dependent variables

Cation and anion concentrations
Dissolved organic carbon (DOC) concentrations
Total nitrogen (TN) concentrations
Total organic carbon (TOC) concentrations
Sediment mineralogy

control variables

Analytical procedures used for water and sediment geochemical analyses
Ion chromatography (Dionex DX-600, USA) for cation and anion measurements
Multi N/C 2100S analyzer (Analytik Jena, Germany) for DOC, TN, and TOC measurements
Sediment sample preparation (drying, grinding, HCl treatment)
X-ray scanning for quantitative mineralogy (2-70 degree two theta, Cu K-alpha radiation, 40 kV, 35 mA)

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