Ingenieurwissenschaften und zugeordnete Tätigkeiten
Filtern
Dokumenttyp
- Posterpräsentation (44) (entfernen)
Referierte Publikation
- nein (44)
Schlagworte
- Fluorescence (12)
- Dye (5)
- Nanoparticle (4)
- Assay (3)
- Flow cytometry (3)
- Iron oxide nanoparticles (3)
- MIPs (3)
- MOFs (3)
- Nano (3)
- Nanomaterial (3)
- Quality assurance (3)
- Quantum dot (3)
- Quantum dots (3)
- Reactive extrusion (3)
- Sialic acid (3)
- AIS (2)
- Barcoding (2)
- Bead (2)
- Encoding (2)
- FTIR (2)
- GD-OES (2)
- Gold nanocluster (2)
- Green chemistry (2)
- InP (2)
- Lifetime (2)
- Lithium Ion Batteries (2)
- Macrophages (2)
- Mechanochemistry (2)
- Method (2)
- Multiplexing (2)
- Nanoparticles (2)
- Optical spectroscopy (2)
- Quantum yield (2)
- Reference material (2)
- SWIR (2)
- Surface chemistry (2)
- Synthesis (2)
- TEM (2)
- Traceability (2)
- Zeolitic imidazolate framework (2)
- 18HLT01 MetVes II (1)
- ASAXS (1)
- Acoustic Emission (1)
- Additive Fertigung (1)
- Additive Manufacturing (1)
- Advanced nanomaterials (1)
- Affinity chromatography (1)
- Affinity extraction (1)
- Affinity support (1)
- Ag2S (1)
- Aging mechanisms (1)
- Aluminum oxide (1)
- Amino acid analysis (1)
- Amorphous phases (1)
- Amorphous silica particles (1)
- Amplification (1)
- Antibodies (1)
- Antibody purification (1)
- Archaea (1)
- Aromatic amino acid analysis AAAA (1)
- Automatisation (1)
- BSA (1)
- Biocomposite (1)
- Bioimaging (1)
- Bovine serum albumin (1)
- CONSENS (1)
- Carbon dot (1)
- Certification (1)
- Certified reference material (1)
- Characterization (1)
- Chromium (III) complexes (1)
- Convolutional neural networks (1)
- Core/shell materials (1)
- Data analysis (1)
- Degree of damage (1)
- Depth-profiling (1)
- Downstream processing (1)
- EDX (1)
- EMPIR project (1)
- ESEM (1)
- Electron microscopy (1)
- Engineered Nanomaterials (1)
- Exciton diffusion (1)
- Extracellular vesicles (EV) (1)
- FIB (1)
- Flow Cell (1)
- Funtional Groups (1)
- Glue (1)
- Glutaraldehyde (1)
- HR-CS-AAS (1)
- Heating oil storage tanks (1)
- Human plasma (1)
- Illumina (1)
- Image segmentation (1)
- Imaging techniques (1)
- In situ Raman (1)
- Integrating sphere spectroscopy (1)
- Isotope analysis (1)
- LMD (1)
- Large-scale production (1)
- Large-scale synthesis (1)
- Ligand (1)
- Ligands (1)
- Lithium batteries (1)
- Lithium-ion batteries (1)
- Luminescence (1)
- Luminescence lifetime measurments (1)
- MOF (1)
- Machine learning (1)
- Magic-sized cluster (1)
- Melt Flow Rate (MFR) (1)
- Microbiologically influenced corrosion (1)
- Microparticles (1)
- NIR (1)
- Nanosafety (1)
- Nanosensors (1)
- Non-classical crystallization (1)
- Online NMR Spectroscopy (1)
- Optical Assays (1)
- Optical Emission Spectroscopy (1)
- Optical properties (1)
- PEG (1)
- PH (1)
- Particle (1)
- Particle Synthesis (1)
- Particle size (1)
- Particle synthesis (1)
- Perovskite (1)
- Phosphates (1)
- Phosphonic acids (1)
- Photoluminescence (1)
- Polyethylene (1)
- Polyglycerol (1)
- Polymer (1)
- Poster presentation (1)
- ProMoAM (1)
- Process Control (1)
- Process Monitoring (1)
- Protein a (1)
- Protein hydrolysis (1)
- Protein immobilization (1)
- Protein quantification (1)
- Prozessmonitoring (1)
- Quantitative Analysis (1)
- Quantitative NMR (1)
- Quantum Dot-Rod (1)
- Quantum Yield (1)
- Rare earth nanoparticles (1)
- Ratiometric Sensors (1)
- Ratiometric sensors (1)
- Reductive amination (1)
- Reference data (1)
- Reference nanomaterials (1)
- Reference particles (1)
- Reference product (1)
- Reliable characterization (1)
- SALSA (1)
- SAXS (1)
- SDS-PAGE (1)
- SEM (1)
- Safe-by-Design (1)
- Safer by design (1)
- Sanger sequencing (1)
- Sapphire (1)
- Sc-ICP-ToF-MS (1)
- Scattering (1)
- Short chained phthalates (1)
- Shortwave infrared (1)
- Silica (1)
- Silica Nanoparticles (1)
- Silica- and Polystyrene Particles (1)
- Silica- and polystyrene particles (1)
- Single cell analysis (1)
- Size and size distribution (1)
- Small angle x-ray scattering (1)
- Spectrometry (1)
- Spectroscopy (1)
- Standard (1)
- Struvite (1)
- Surface (1)
- Surface analysis (1)
- Surface group analysis (1)
- Thermography (1)
- Titration (1)
- Transition metal (1)
- Transmission electron microscopy (1)
- Tyrosine (1)
- UpConversion (1)
- Upconversion (1)
- Upconversion nanoparticles (1)
- ZnSe (1)
- aggregation-induced dual emission (AIDE) (1)
- bioimaging (1)
- depth-profiling (1)
- fluorine (1)
- pH probe (1)
- pH sensing (1)
Organisationseinheit der BAM
- 1 Analytische Chemie; Referenzmaterialien (44) (entfernen)
Tanks for heating oil made of polyethylene grades have been on the market since the early 1970s in Germany. Tank manufacturers recommend the replacement of the tanks after a period of 30 years due to guarantee safety. Polyethylene grades are subject to ageing by alteration of the properties during their life cycle. The degree of ageing and the nature of the degradation process mainly depend on the chemical degradation of the polyethylene, the wall thickness of the tank and the environmental conditions. There are no results available on the long-term behavior of the polyethylene grades, especially after a service life of more than 30 years. The aim of this investigation was the determination of the factual degree of damage in comparison to the uncontaminated polyethylene grades. Material data of the used polyethylene grades are available because the BAM was the competent authority for the tests and expert reports for the approval of these tanks until the middle of the 1990s.
The determination of the Melt Flow Rate (MFR) and the Fourier Transmission IR Spectroscopy (FTIR) of tank sections from the bottom, the shell and the roof of 10 segregated heating oil storage tanks produced of polyethylene grades A and B were used as tests methods.
The MFR measurements of the tank sections showed differences in the values depending on the weight which was used (5 kg or 21.6 kg). A reduction of the MFR values was measured for most of the sections of tanks made of polyethylene grade B after a service life of the tanks of more than 30 years. This grade is mainly subject to the internal ageing by cross-linkages, increased degree of branched molecules and loss of the plasticizer, and to a lesser extent by oxidative degradation. The FTIR analysis, especially of tank sections of the bottom and the shell showed that the intensity of the CH2 asymmetric and symmetric stretching vibrations in the range: 2800 - 2900 cm-1 and the CH2 bending deformation vibration at 1400 cm-1 increased due chain scissions. The intensity of the carbonyl stretching vibration C=O at 1740 cm-1 is low. The carbonyl index characterizes the degree of oxidation.
Compact nuclear magnetic resonance (NMR) instruments make NMR spectroscopy and relaxometry accessible in industrial and harsh environments for reaction characterization and process control. Robust field integration of NMR systems have to face explosion protection or integration into process control systems with short set-up times. This paves the way for industrial automation in real process environments.
The design of failsafe, temperature and pressure resistant flow through cells along with their NMR-specific requirements is an essential cornerstone to enter industrial production plants and fulfill explosion safety requirements. Additionally, if fast reactions are monitored, suitable mixing devices need to be placed in close vicinity to the measuring volume to mix the reactants properly.
NMR-specific requirements aim at full quantitative pre-magnetization and acquisition with maximum sensitivity while reducing sample transfer times and dwell-times. All parameters are individually dependent on the applied NMR instrument.
Luckily, an increasing number of applications are reported together with an increasing variety of commercial equipment. However, these contributions have to be reviewed thoroughly.
The performance of sample flow cells commonly used in online analytics and especially for low-field NMR spectroscopy was experimentally and theoretically investigated by 1H-NMR experiments and numerical simulations. Especially, the applicability of 3D printed zirconium dioxide for innovative flow cell designs was of interest. Here, we demonstrate and discuss an automated test method to determine the critical parameters of flow through cells for quantitative online NMR spectroscopy. The setup is based on randomized setpoints of flow rates in order to reduce temperature related effects. Five flow cells and tubing were assessed and compared for high-field as well as low-field NMR spectrometers.