Rice straw in this study was collected from the waste biomass of the farm of Yiyang, Hunan province, China. Hydrochloride salt of tetracycline (TC) was obtained from Hefei Bomei Biotechnology Co., Ltd., China. Humic acids (HAs) were purchased from Shanghai Chemical Corp. (Shanghai, China), which was purified before use, and the purification method referred to Wang et al.25 (link) (described in the Supplementary Materials ). All other chemicals used in this work were analytical grade and solutions were prepared using Milli-Q water (18.2 MΩ/cm) (Millipore, Billerica, MA) in this work.
Milli q water 18.2 mω cm
Manufactured by Merck Group
Sourced in United States, Czechia
Milli-Q water (18.2 MΩ/cm) is a high-purity water produced by a water purification system. It has a resistivity of 18.2 megohm-centimeter, which indicates its extremely low level of impurities.
Automatically generated - may contain errors
3 protocols using milli q water 18.2 mω cm
1
Tetracycline Adsorption on Rice Straw and Humic Acids
2
LCXLC-MS Analyte Profiling Protocol
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Acetonitrile (ACN, MS grade), methanol (HPLC grade) and water (MS grade) were purchased from Biosolve Chimie (Dieuze, France). Milli-Q water (18.2 MΩ cm) was obtained from a purification system (Millipore, Bedford, MA, USA). Ammonium acetate (AcNH4, analytical grade; 98%) and acetic acid (analytical grade; 99%) were purchased from Sigma-Aldrich (Darmstadt, Germany). The "Perfluorinated Native Compound Standard" mixture (PFC-24-10X) adopted as the analyte training set for method development, was purchased by AccuStandard (New Haven, CT, USA), and its details and composition are reported in The equipment used for the modulation valve of the LC × LC system consisted of a capillary (0.12 × 120 mm, Agilent Technologies, Waldbronn, Germany) and two C18 guard columns (SecurityGuard Ultra AJ0-87822.1 × 2 mm and sub-2 μm particle, Phenomenex, Utrecht, NL) used for analyte trapping.
3
Analytical Procedure for Solvents
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For performing the experiments, solvents that were provided were of analytical grade.
Most of organic solvents were procured from Zorka pharma, Šabac, Serbia. Acetonitrile (HPLC grade), purchased from Merck KG (Darmstadt, Germany), formic acid (85% pure), purchased from Lach-Ner, s.r.o. (Neratovice, Czech Republic) and Milli Q water 18.2 MΩcm, obtained from a Millipore Simplicity 185 purification system, were used for the LC-MS analyses. Gallic
Most of organic solvents were procured from Zorka pharma, Šabac, Serbia. Acetonitrile (HPLC grade), purchased from Merck KG (Darmstadt, Germany), formic acid (85% pure), purchased from Lach-Ner, s.r.o. (Neratovice, Czech Republic) and Milli Q water 18.2 MΩcm, obtained from a Millipore Simplicity 185 purification system, were used for the LC-MS analyses. Gallic
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