Cerimetry¶

Cerimetry or cerimetric titration, also known as cerate oximetry, is a method of volumetric chemical analysis developed by Ion Atanasiu.

Version: v1 · 2026-09-28 · History
Domain-specific #: 8394
Domain group: Natural Sciences
Origin domain: Chemistry & Materials Science
Subdomains: Analytical Chemistry, Redox Titration → Chemistry & Materials Science

Core Idea¶

Cerimetry is treated here as the recurring natural science, engineering, and health identity summarized by this source-grounded definition: Cerimetry or cerimetric titration, also known as cerate oximetry, is a method of volumetric chemical analysis developed by Ion Atanasiu. Cerimetry or cerimetric titration, also known as cerate oximetry, is a method of volumetric chemical analysis developed by Ion Atanasiu. It is a redox titration in which an iron(II)–1,10-phenanthroline complex (ferroin) color change indicates the end point. Ferroin can be reversibly discolored in its oxidized form upon titration with a Ce 4+ solution.

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Count-the-Drops Color Test

Scientists sometimes need to know how much of a certain stuff is in a liquid. They slowly add drops of a special liquid made with a metal called cerium, which reacts with it. When the stuff is all used up, a color dye suddenly changes, and they count how much they added.

Cerium Color-Change Measuring

Cerimetry is a way chemists measure how much of a substance is in a sample, using a method called titration. They slowly add a liquid containing a form of the metal cerium, which grabs electrons from the substance being measured. A helper chemical called ferroin is also in the mix, and it changes color when all of the substance has reacted. By measuring how much cerium liquid it took to reach that color change, chemists can work out how much substance was in the sample. The method was developed by a chemist named Ion Atanasiu.

Cerium(IV) Redox Titration

Cerimetry, or cerimetric titration (also called cerate oximetry), is a method of volumetric chemical analysis credited to Ion Atanasiu. It is a redox titration: a standard solution of cerium(IV), often made from cerium sulfate, is added to the sample and oxidizes the substance being measured. The end point is shown by a color change of ferroin, an iron(II) complex with 1,10-phenanthroline, which loses its color reversibly when oxidized by the Ce⁴⁺. Because the method is tied to the Fe³⁺/Fe²⁺ redox pair, it can be used to analyze samples that either oxidize Fe²⁺ or reduce Fe³⁺. Using cerium(IV) salts for this purpose was first suggested in the mid-1800s, but systematic study began about 70 years later.

Cerimetry (cerimetric titration, also termed cerate oximetry) is a volumetric redox method of chemical analysis attributed to Ion Atanasiu, in which a standardized cerium(IV) solution serves as the oxidizing titrant. Standard solutions can be prepared from various Ce⁴⁺ salts, with cerium sulfate being a common choice. The end point is indicated by ferroin, the iron(II)–1,10-phenanthroline complex, whose color change on oxidation by Ce⁴⁺ is reversible. Because the analysis is coupled to the Fe³⁺/Fe²⁺ redox pair, it can quantify species that oxidize Fe²⁺ or reduce Fe³⁺. Cerium(IV) reagents were proposed for volumetric analysis in the mid-19th century, but systematic studies began roughly seventy years later. The identity of the method lies in this specific Ce⁴⁺ redox titration with ferroin end-point detection, not merely in the use of cerium or in redox analysis generally.

Scope of Application¶

Documented setting. Cerimetry or cerimetric titration, also known as cerate oximetry, is a method of volumetric chemical analysis developed by Ion Atanasiu.
Documented setting. Since cerimetry is linked to the Fe 3+ /Fe 2+ redox pair, it can be used for analyses of nonstoichiometric levels that either oxidize Fe 2+ or reduce Fe 3+ .
Documented setting. It is a redox titration in which an iron(II)–1,10-phenanthroline complex (ferroin) color change indicates the end point.
Documented setting. Ferroin can be reversibly discolored in its oxidized form upon titration with a Ce 4+ solution.
Documented setting. The use of cerium(IV) salts as reagents for volumetric analysis was first proposed in the middle of 19^th century, but systematic studies did not start until about 70 years later.

Clarity¶

A clear use of Cerimetry names the carrier, the operative relation, and the conditions under which the source treats the identity as present. The minimal definition is Cerimetry or cerimetric titration, also known as cerate oximetry, is a method of volumetric chemical analysis developed by Ion Atanasiu.

Manages Complexity¶

Cerimetry compresses multiple natural science, engineering, and health details into a stable diagnostic relation. The source shows both the central mechanism—it is a redox titration in which an iron(II)–1,10-phenanthroline complex (ferroin) color change indicates the end point.—and the practical consequence—since cerimetry is linked to the Fe 3+ /Fe 2+ redox pair, it can be used for analyses of nonstoichiometric levels that either oxidize Fe.

Abstract Reasoning¶

Type the carrier. Identify the natural science, engineering, and health entities to which the claim applies.
State the relation. Use the source-grounded identity: Cerimetry or cerimetric titration, also known as cerate oximetry, is a method of volumetric chemical analysis developed by Ion Atanasiu.
Check operation and conditions. Ferroin can be reversibly discolored in its oxidized form upon titration with a Ce 4+ solution.
Demand recognition evidence.

Knowledge Transfer¶

Within the home domain. Knowledge about Cerimetry transfers literally when a new case preserves the same carrier type, relation, and recognition test. Cerimetry or cerimetric titration, also known as cerate oximetry, is a method of volumetric chemical analysis developed by Ion Atanasiu. Since cerimetry is linked to the Fe 3+ /Fe 2+ redox pair, it can be used for analyses of nonstoichiometric levels that either oxidize Fe 2+ or reduce Fe 3+ . Beyond the home domain. No canonical parent is asserted for Cerimetry.

Neighborhood in Abstraction Space¶

Cerimetry sits in a sparse region of the domain-specific corpus (94^th percentile for distinctiveness): few abstractions share its structure, so a faithful description tends to retrieve it precisely.

Family — Unclustered & Miscellaneous (2551 abstractions)

Nearest neighbors

Computed from structural-signature embeddings · 2026-10-08