Dual Sampling Heads for Trace and Bulk Chemical Analysis

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Solution Overview

Problem

Existing trace detection systems are inefficient for material identification from bulk samples, leading to wasteful and cumbersome procedures, and analytical instruments are overloaded when large samples are introduced, necessitating separate detectors like Raman spectroscopy or FTIR for bulk analysis.

Innovation Solution

A dual-purpose sampling apparatus with a trace detection head and bulk detection head, allowing for maximum residue collection from surfaces and small sample collection from bulk samples, using interchangeable heads with resistive heating elements for efficient sample delivery to analytical instruments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single sampling apparatus is used for both trace and bulk sample collection, then device complexity is reduced and ease of operation is improved, but the sampling apparatus must accommodate conflicting requirements for sample collection efficiency

Engineering Contradiction:

Improvenumber of sampling apparatusVSAvoidsampling efficiency for different sample types

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The sampling apparatus is divided into two distinct heads: a trace detection head with a large surface area swab support (1-100 cm²) for maximizing residue collection from surfaces, and a bulk detection head with a small surface area collector (0.1-1 cm²) for collecting minimal samples from bulk materials. This segmentation allows each head to be optimized for its specific function while sharing a common wand extension and heating system.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The single sampling apparatus incorporates both trace and bulk detection capabilities in one device, allowing it to perform multiple functions. The interchangeable heads can be attached to the same wand extension, and both heads include resistive heating elements for sample delivery, making the apparatus universally applicable to both trace residue collection and bulk sample collection without requiring separate instruments.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Quantity of substance

If multiple disposable swabs are used to decrease sample amount for trace detection, then sample amount is controlled, but waste increases and procedure becomes cumbersome

Engineering Contradiction:

Improvesample amountVSAvoidwaste of disposable swabs

Core Design Contradiction:

Quantity of substanceVSLoss of substance

Solution Approach 1:

The swab support is designed to be reusable rather than disposable. The resistive heating element can be electrically coupled to an analytic instrument to vaporize and deliver collected samples, allowing the swab support to be recovered and reused for multiple sampling operations. This eliminates the need to discard swabs after single use while maintaining control over the quantity of sample delivered to the detector.

Inventive Principle:

Principle #34Discarding and recovering

3Quantity of substance

If large samples are introduced to analytical instruments, then bulk sample analysis is enabled, but instrument overload occurs and clean cycles are extended

Engineering Contradiction:

Improvesample amountVSAvoidanalysis throughput

Core Design Contradiction:

Quantity of substanceVSProductivity

Solution Approach 1:

The bulk detection head uses a collector with a specifically designed small surface area (0.1-1 cm²) to limit the amount of sample collected from bulk materials. This parameter control ensures that only nanogram to low microgram amounts are transferred to the analytical instrument, preventing overload and extending productivity while still enabling bulk sample analysis through controlled sampling.

Inventive Principle:

Principle #35Parameter changes

4Measurement precision

If separate detectors are used for trace and bulk analysis, then detection precision is optimized for each sample type, but device complexity and ease of operation worsen

Engineering Contradiction:

Improvedetection precisionVSAvoidoperational simplicity

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The patent combines trace and bulk detection capabilities into a single sampling apparatus with interchangeable heads. Both heads share common components including the wand extension, resistive heating elements for sample delivery, and electrical coupling to analytical instruments. This merging maintains detection precision for both sample types while simplifying operation by allowing users to switch between trace and bulk modes using a single device rather than managing multiple separate detectors.

Inventive Principle:

Principle #5Merging (Combining)

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

Enables efficient collection and analysis of both trace and bulk samples using a single apparatus, reducing waste and instrument overload, and facilitating seamless integration with various analytical instruments.

Implementation Method 1

The swab support can have a resistive heating element. The resistive heating element can be electrically coupled to an electrical contact on the body of the trace detection head.

Methodology Applied

Scientific EffectResistive heating: Joule Heating

Data Source

PatentUS12571706B2Multipurpose sampling apparatus for chemical analyzer

Publication Date: 2026.03.10 VIKEN DETECTION CORP

AI summary

A sampling apparatus includes a wand extension coupled with a trace detection head and a bulk detection head. The trace detection head collects a maximum amount of a sample for a trace detection analysis. The bulk detection head collects a minimal amount of a substance for use in bulk sample identification.