Silver TPTZ Halide Measurement Without Hazardous Reagents

Solution Overview

Problem

Conventional methods for measuring halides, such as chloride, in water samples use hazardous reagents like mercury, dichromate, and thiocyanate, posing health risks and disposal challenges, and are costly.

Innovation Solution

A method and device using silver 2, 4, 6-Tripyridyl-s-triazine (TPTZ) and iron (II) in a colorimetric reaction to measure halides, eliminating the need for hazardous reagents and allowing for accurate halide detection through absorbance intensity changes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional methods use hazardous reagents like mercury, dichromate, and thiocyanate to measure halides, then measurement capability is achieved, but health risks and disposal costs increase

Engineering Contradiction:

Improvehalide measurement capabilityVSAvoidhealth risks from hazardous reagents

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent replaces expensive, hazardous reagents (mercury, dichromate, thiocyanate) with a cheaper, safer alternative system using silver ions and TPTZ indicator. The new reagent system can be disposed of safely without special hazardous waste procedures, effectively treating the measurement reagents as non-hazardous consumables that eliminate health risks while maintaining measurement capability

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent changes the chemical parameters of the measurement system by substituting the conventional reagent chemistry with a silver-TPTZ colorimetric system. This parameter change transforms the measurement process from one requiring hazardous substances to one using safe, non-toxic reagents that achieve the same analytical function

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If conventional methods use hazardous reagents like mercury, dichromate, and thiocyanate to measure halides, then measurement capability is achieved, but disposal costs increase

Engineering Contradiction:

Improvehalide measurement capabilityVSAvoiddisposal costs of hazardous chemicals

Core Design Contradiction:

Measurement precisionVSLoss of substance

Solution Approach 1:

The patent replaces expensive, hazardous reagents (mercury, dichromate, thiocyanate) with a cheaper, safer alternative system using silver ions and TPTZ indicator. The new reagent system can be disposed of safely without special hazardous waste procedures, effectively treating the measurement reagents as non-hazardous consumables that eliminate health risks while maintaining measurement capability

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent changes the chemical parameters of the measurement system by substituting the conventional reagent chemistry with a silver-TPTZ colorimetric system. This parameter change transforms the measurement process from one requiring hazardous substances to one using safe, non-toxic reagents that achieve the same analytical function

Inventive Principle:

Principle #35Parameter changes

3Object-affected harmful factors

If silver TPTZ and iron (II) are introduced to measure halides through colorimetric reaction, then health safety and disposal costs are improved, but measurement precision must be maintained

Engineering Contradiction:

Improvehealth safetyVSAvoidhalide concentration determination accuracy

Core Design Contradiction:

Object-affected harmful factorsVSMeasurement precision

Solution Approach 1:

The patent utilizes the colorimetric reaction between silver ions, TPTZ indicator, and iron (II) to produce a measurable color change that correlates with halide concentration. The formation of the silver-TPTZ complex and subsequent reaction with iron (II) generates a distinct color signal that can be quantified spectrophotometrically, ensuring accurate halide determination while using safe reagents

Inventive Principle:

Principle #32Color changes

Solution Approach 2:

The patent replaces the mechanical/chemical handling of hazardous reagents with an optical measurement system. By using colorimetric detection with silver-TPTZ-iron (II) reaction, the system substitutes direct chemical interaction with hazardous substances with an optical signal measurement approach, maintaining precision while improving safety

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Provides a safer, cost-effective, and accurate method for measuring halides in water samples without the use of harmful chemicals, reducing health risks and disposal costs while ensuring precise halide concentration determination.

Implementation Method 1

using silver 2, 4, 6-Tripyridyl-s-triazine (silver TPTZ) and an amount of iron (II) to the sample to make a reaction solution

Methodology Applied

Scientific EffectColorimetric reaction: Chemical Bonding

Implementation Method 2

measuring an intensity of the absorbance of the reaction solution

Methodology Applied

Scientific EffectAbsorbance: Absorption (EM radiation)

Data Source

PatentUS20260063557A1Halide measurement with silver, 2,4,6-tripyridyl-s-triazine

Publication Date: 2026.03.05 HACH

AI summary

An embodiment provides a method for measuring a halide in a sample, including: adjusting the pH of the sample with an amount of p-Toluenesolfonic acid (p-TSA); introducing silver 2, 4, 6-Tripyridyl-s-triazine (silver TPTZ) and an amount of iron (II) to the sample to make a reaction solution, wherein the sample comprises an amount of a halide; and measuring, using a color method, the amount of the halide in the sample by measuring an intensity of the absorbance of the reaction solution. Other aspects are described and claimed.