Analysis Using Chemical Indicators TRIZ Cases

A lithium reagent composition using F28 tetraphenylporphyrin enables rapid visual detection of lithium concentration in serum samples through a distinct yellow to red color change.

Elastic positioning members suspend tissue specimens to prevent deformation during transport, enabling accurate margin detection via radiopaque grid references.

Replacing melamine with 2,4-diamino-6-methyl-1,3,5-triazine eliminates non-homogeneous precipitates and improves measurement reliability.

Replacing mass spectrometry, this method uses disposable test strips to detect toxic phosphorylating agents without complex instrumentation.

Analytical tool filters sample liquid through separation film thickness direction, reducing retention time and eliminating pump requirements.

One-step liquid composition merges cleaning agent and adhesion promoter, eliminating separate processing steps that increase manufacturing time.

Nanoporous sol-gel matrix with probe molecules enables direct aldehyde detection, eliminating complex chromatographic analysis and sample trapping steps.

A surface acoustic wave sensor uses independent signal sources to drive sensing and reference elements at distinct frequencies.

Gold(III) oxide in the display layer resolves diffuse color changes, enabling accurate benzene detection at 1 ppm.

Densified polymer membranes with embedded luminophores shift wavelengths and reduce heat while maintaining high optical transmittance.

An optochemical sensor uses a composite barrier layer to block corrosive interferents while allowing analyte passage, extending service life.

Clinical sampling system uses optical imaging to capture test strip reactions and determine target compound concentrations.

A specimen collection device integrates a swab shaft with an interchangeable desiccant chamber for controlled drying.

Multi-color redox indicators resolve MPN method limitations by enabling precise relative content determination through visual color variation tracking.

Automated extraction from sealed cartridges eliminates manual strip insertion, reducing contamination risks during glucose determination.

Capacitive or resistive sensors monitor corrosion on printed circuit boards by tracking electrical changes in corrodible metals, preventing device failure.

A closed bipolar electrode couples analytical reactions with an electrochromic reporter system to generate visible color changes.

Preferential expression of TNT-responsive odorant receptors in olfactory sensory neurons lowers detection thresholds while reducing system complexity.

A sample preparation assembly uses a concentric torch and heat sink to maintain precise component alignment.

A perfluorosulfonate ionomer membrane optical sensor detects target compounds through a visible color shift upon exposure.

Direct flow measurement via micro-scale sensors resolves indirect method errors, ensuring accurate blood counts per unit volume.

Integrated fluidic system controller adjusts sample and sheath flow rates for precise core stream formation in flow cytometry.

Disposable test strips detect active, diluent, and preservative components to authenticate consumer products without complex laboratory instruments.

Removing hydroxyl or thiol groups from rhodamine structures eliminates solution instability while maintaining physiological pH sensitivity.

A fuel physical property determination device compares test fuel flame images with standard-mixed fuel reference data to identify combustion characteristics.

A lateral flow test strip uses a hydrophobic member to inhibit sample backflow and enable capillary transport through reagent pads.

A programmable electronic pipette uses a multi-functional thumb wheel for menu navigation and parameter selection.

Heat-sealing cassette bonds aluminum foil to test tube mouths, preventing fluid spillage and personnel contamination.

Integrated light pipe indicator detects sample volume adequacy, eliminating centrifugation steps and reducing contamination risk during point-of-care testing.

Mixed organic solvents prevent liquid-phase interference, enabling accurate gas-phase OH radical measurement.

Absorbent pad captures oral fluid and triggers an LED circuit when the sample volume reaches a predetermined threshold.

Thiocarboxylic acid reagents form colored complexes with iron ions, enabling rapid colorimetric analysis to detect early cold corrosion in marine engines.

Porous metal oxide sorbents change color upon exposure to acidic contaminants, resolving the inability of traditional filters to indicate saturation levels.

Indanedione reagent develops continuous fingerprint lines on fabrics, enabling accurate suspect identification from non-obvious traces.

Boronic ester bonds anchor a polymer dye to solid supports, eliminating impurity adsorption that causes unstable detection in biological samples.

A color-changing dye composition detects organic contaminants through visual or photometric analysis.

A portable spectrometer device uses fluidic channels and a liquid blocker vent to perform optical measurements of fluid samples at the point of collection.

A disposable capsule releases a tracer upon dissolving in acidic fluid, eliminating complex sensor hardware costs.

Immobilizing detection reagents on a disposable substrate eliminates liquid spill risks while enabling rapid visual identification of explosives.