Measuring an analyte in breath using a porous structure containing a reactant

An apparatus for analyzing breath, comprising

• a porous structure that comprises a blend of a reactive material and a resin material, the porous structure capable of extracting an analyte of interest from the breath sample when the breath sample is passed through the porous device;
• and
• a sponge that holds a volume of developer solution, the sponge configured to deliver the developer solution to the porous structure when the sponge and porous structure are brought into contact with each other, the developer solution capable of inducing a measurable change reflecting a quantity of the analyte of interest extracted by the porous structure.

A method, comprising:

• causing a breath sample to be passed through a porous structure that includes a reactive material, wherein the porous structure extracts an analyte of interest from the breath sample;
• and
• subsequently, bringing the porous structure into contact with a sponge that holds a developer solution, to thereby cause developer solution to be transferred from the sponge into the porous structure, wherein the developer solution induces a measurable change reflective of a quantity of the analyte of interest extracted by the porous structure.