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Vario el instrument

Manufactured by Elementar
Sourced in Germany

The Vario EL instrument is a combustion analyzer used for the determination of carbon, hydrogen, nitrogen, and sulfur in a wide range of solid, liquid, and gaseous samples. It provides accurate and reliable elemental analysis results.

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5 protocols using vario el instrument

1

Structural Characterization of PAND

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The structure of the PAND was characterized by FTIR and 1H NMR. The KBr pellets method was used to obtain the FTIR spectra. Using an IRTracer-100 FTIR spectrometer (Shimadzu, Kyoto, Japan), the FTIR of the materials was recorded in the 4000–400 cm−1. A Brucker Advance DPX-300 spectrometer (Brucker, Mannheim, Germany) was used to record the 1H NMR spectra of the PAND with a 30° pulse at 25 °C. For the measurement, 5 mg of samples were dissolved in 0.7 g of water and placed into an NMR tube. For better dissolution, a little NaCl was added into D2O. The elemental composition of PAND was analyzed by an Elementar Vario EL instrument. On a Mettler Toledo TGA/SDTA 851 equipment, thermogravimetric analysis (TGA) was carried out over a temperature range of 40–650 °C at a heating rate of 10 K/min under a N2 atmosphere.
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2

Elemental Composition Analysis of Graft Polymers

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To determine the composition of the graft polymer, the content of carbon, hydrogen, nitrogen and sulfur was determined using a vario EL instrument from Elementar Analysesysteme GmbH, Langenselbold, Germany. The calibration was carried out with sulphanilic acid. The fluorine-containing samples are measured in C, H, N, S mode at a furnace temperature of 1150 °C.
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3

Organic Elemental Microanalysis Protocol

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Organic elemental microanalysis was carried out by Elementar Vario EL Instrument (Elementar, Germany) to analyze weight percentages of carbon (C), hydrogen (H), and nitrogen (N). All analyses were done in triplicate.
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4

Characterization of Cobalt(II) Complexes

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Cobalt(II)
acetate tetrahydrate and NaHCO3 were used
as received from Merck (Germany). Commercial-grade methanol, distilled
over CaCl2, was used for synthesis of the complexes. IR
(attenuated total reflectance, ATR) spectra were recorded on a Nicolet
iS10 spectrometer at ambient temperature. Elemental analyses were
run on a Vario EL instrument from Elementar Analysensysteme. EI-MS
spectra were acquired with a Thermo-Finnigan TSQ 700 spectrometer.
Isotopic distribution patterns for 58/60Co [in Co-(R or S)-L1 and Co-(R or S)-L2] or combined 58/60Co + 79/81Br [Co-(R or S)-L3] containing
ions are detected in the mass spectra. DSC was run on a Shimadzu DSC-60A
heat-flux instrument (working in endodown mode) in the range 30–240
°C (just up to decomposition temperature) with a rate of 10 K
min–1 under a nitrogen atmosphere. NMR spectra were
measured on a Bruker Avance III-300 spectrometer.
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5

Comprehensive Characterization of DDAM

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NMR spectra of DDAM were acquired using an NMR spectrometer (Bruker AVANCE III NMR) with deuterated water (D2O) as the solvent. Fourier transform infrared (FTIR) spectrometry (A225/Q Platinum ATR) was also conducted to confirm the structure of DDAM. The elemental composition of DDAM was analyzed by the Elementar Vario EL instrument. The thermal property of DDAM was evaluated by the thermogravimetric analyzer (Mettler Toledo Co., Zurich, Switzerland) under nitrogen purging and a heating rate of 10 °C/min.
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