The term "limit test" is not a standard or widely recognized term in the context of inorganic compound analysis. It's possible you are referring to a specific analytical technique or test used for a particular purpose, which has a localized or industry-specific meaning.

To provide a more accurate answer, please clarify what you mean by "limit test." Consider providing more context, such as:

* What is the specific inorganic compound you are interested in?

* What is the intended application of the test? (e.g., quality control, environmental monitoring, safety assessment)

* What are you trying to determine with the test? (e.g., concentration of a specific element, presence or absence of a specific contaminant)

Once you provide more information, I can help you understand the relevant terminology and methodologies.