lab

 

In a number of instances a new method is developed from an existing one.  In these situations it is sometimes difficult to appreciate why a method is better/different especially when it is a smaller change.  This category of metadata was developed in order to capture more detail about a method(s) from the perspective of the chemistry or processing of samples, i.e. the use of different material, glassware or small components of an analytical system.  For instance, the addition of a new chemical to a reagent may add stability that improves the reliability of a method, or the use of a different analytical column affords a faster or lower interference detection. If you have a better name for this category than materials send your suggestion to This email address is being protected from spambots. You need JavaScript enabled to view it..

  • chemical: a synthesized or purchased amount of a chemical substance that is an important part of the analysis (string) [04-29-15]
  • solution: a prescribed solution that is part of the processing or reaction with the analyte in an analysis (string) [04-29-15]
  • glassware: containers, utensils, and apparati that are made of glass and are important in the chemical analysis process (string) [04-29-15]
  • component: a general category for other pieces/parts that are used specifically in a procedure, e.g. analytical column (string) [04-29-15]

The third example metadata standard, in JSON-LD format, is not about an analytical method at all.  Standard reference materials are vital resources in chemical analysis to show accuracy of new and revised analytical methods and verify the accuracy of chemical analysis over time.  Agencies that produce standard methods perform rigorous chemical analysis (using two or more analytical techniques) to report certified values for analytes.  Thus, ChAMP can be used to capture metadata about the material itself and also the methods of analysis used to determine analytes in the material.

[Other links: ChAMP JSON-LD ContextChAMP Journal Article JSON-LD ExampleChAMP Standard Method JSON-LD Example]

JSON-LD Context

refmaterial context

Example File - NIST SRM 3668

refmaterial jsonld

For a second example of the use of ChAMP in creation of a standard (in JSON-LD format), we chose standard methods for obvious reasons. Standard methods of chemical analysis are published by many entities and for many application areas and while you can find many of these methods on the Internet searching for the most sensitive, or the one that best fits your application need is not always easy.  Extraction and annotation of metadata using ChAMP, as outlined below, is a great way to allow scientists to find what they need fast.

[Other links: ChAMP JSON-LD ContextChAMP Journal Article JSON-LD ExampleChAMP Referemce Material JSON-LD Example]

JSON-LD Context

stdmethod context

Example File - EPA Method 7196A

stdmethod jsonld

The third example metadata standard is not about an analytical method at all.  Standard reference materials are vital resources in chemical analysis to show accuracy of new and revised analytical methods and verify the accuracy of chemical analysis over time.  Agencies that produce standard methods perform rigorous chemical analysis (using two or more analytical techniques) to report certified values for analytes.  Thus, ChAMP can be used to capture metadata about the material itself and also the methods of analysis used to determine analytes in the material.

[Other links: ChAMP XML SchemaChAMP Journal Article XML ExampleChAMP Standard Method XML Example]

XML Schema

refmaterial schema

Example File - NIST SRM 3668

refmaterial xml