Practical chemistry, tools and learning
Chem-Analyses Lab is an independent website run by a technical professional with practical experience in chemical analysis. It offers browser tools, practical guides and analytical chemistry news to support laboratory work and learning.
About the operator
The operator has 20 years of practical chemical-analysis experience across quality control, research and development, and analytical method development, with particular expertise in polymer materials.
This experience includes gas chromatography–mass spectrometry (GC/MS), inductively coupled plasma mass spectrometry (ICP-MS), liquid chromatography–mass spectrometry (LC/MS), nuclear magnetic resonance (NMR), differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). The operator has published papers in Japanese and international journals and holds an ISO/IEC 17025 assessor qualification. The operator's name and the organization awarding that qualification are not disclosed.
The site shares useful analytical knowledge and tools the operator wanted to use personally. Its content does not represent the official views of an employer or accreditation body. Experience and qualifications do not certify the compliance of individual tools or articles.
What you can use here
- Chemliora — chemical structure editor: draw and save structures, explore reference infrared and electron-ionization mass spectra, approximate proton and carbon NMR and ultraviolet–visible spectra, and simplified highest occupied and lowest unoccupied molecular orbital calculations. The editor has Japanese and English interfaces.
- ICP-MS/OES concentration conversion: convert measured solution concentrations to original-sample concentrations and review means, sample standard deviations, relative standard deviations and intermediate calculations. Japanese interface.
- Polymer thermal-property search: compare glass-transition and melting temperatures by polymer name or temperature. Values include references and source notes. Japanese interface.
- Polymer chain builder: generate finite-chain models, adjust copolymer sequences and end groups, inspect formulas and molar masses, view 3D models and save images or structure files. Japanese interface.
- NMR solvent, water and impurity peak lookup: browse literature proton and carbon NMR peaks in nine deuterated solvents or search near a chemical shift in parts per million (ppm). Japanese interface.
English guides cover analytical calculations and chemical structures. English news summarizes public developments relevant to analytical practice. Additional material is available in the Japanese article collection.
Languages and availability
English coverage is expanding gradually. Use the language links on supported pages to switch between corresponding editions. Not every page, diagram or reference is available in both languages. Japanese-only destinations are identified where practical.
How content is prepared and checked
The operator prepares article drafts and uses generative AI to assist with wording and organization. Tools are developed from the operator's ideas with AI assistance. Chem-Analyses Lab is responsible for editorial decisions.
Articles and news cite public sources. We distinguish reported facts, explanations, illustrative calculations and tool demonstrations. Examples do not use confidential employer, customer or real-sample data. Check each page for its update date, scope, and the relevant edition of a standard or method.
- Illustrative numbers are distinguished from measured results. A calculation example does not establish instrument or method performance.
- Tool examples explain inputs, expected displays and what was checked. A screen demonstration is different from experimental validation.
- AI assistance is not evidence of accuracy. Source documents and calculation steps provide the basis for checking claims. Generated illustrative photographs are not experimental records.
- An article update date records a content review; it is distinct from the adoption or effective date of a standard or news event.
Corrections and feedback
Report errors or unclear explanations through the feedback and bug-report form. Include the page, relevant passage and supporting source. Do not submit confidential workplace, customer or sample data. Reports are reviewed and necessary corrections are reflected in the text, update date and notes. Individual replies are not provided.
Research technology and attribution
Research and evaluation of prediction methods use Universal Models for Atoms (UMA). References include Wood et al., UMA: A Family of Universal Models for Atoms and Levine et al., The Open Molecules 2025 (OMol25) Dataset, Evaluations, and Models.
Chemliora's approximate proton/carbon NMR and ultraviolet–visible prediction models learn from quantum-chemical calculations using UMA-optimized structures. UMA model weights and experimental evaluation data are not included in the published site. Chemical shifts and spectra are estimates, not evidence of chemical identity.
Using the information
Tools and articles support investigation and learning. Check results, structures, predictions, property values and method suitability against measured data, reliable references, applicable standards, standard operating procedures and instrument specifications. See the privacy information and terms (Japanese) for data handling and conditions of use.