Gunshot Residue (GSR) Collection Kit

One kit for screening and confirmation workflows. The Tri-Tech Forensics GSR-AA/SEM(C) is a combination gunshot residue collection kit designed to support a rapid Atomic Absorption (AA) screen and, where required, a more definitive Scanning Electron Microscopy (SEM) analysis. This dual-method approach helps streamline collection and laboratory processing when both techniques are used.

Packaged in a tamper-evident, pre-sealed envelope and supplied with labelled tubes/vials and documentation, the kit supports consistent evidence handling from collection through to laboratory submission.

Why teams choose this kit

• Dual-method capability: supports AA screening with the option of SEM confirmation where warranted.
• Standardised hand sampling: labelled right/left, back/palm components reduce ambiguity during collection.
• Chain-of-custody support: tamper-evident packaging and resealing evidence seal for controlled transfer.
• Field-ready components: includes gloves, forms, and dedicated tubes/vials for commonly collected GSR items.

What’s included

• 1 × Tamper-evident, pre-sealed kit envelope (approx. 15.2 cm × 22.9 cm)
• 1 × Step-by-step kit instruction sheet
• 1 × Gunshot Residue Analysis information form
• 1 × Pair of disposable plastic gloves
• 1 × Resealable bag (approx. 5.1 cm × 7.6 cm) containing:
  • 12 × Cotton-tipped, plastic-shaft swabs
• 1 × 3 mL dispenser containing a 5% nitric acid solution
• 1 × Control tube and cap
• 1 × Cartridge case tube and cap
• 1 × Set of tubes and caps labelled: Right Back, Right Palm, Left Back, Left Palm
• 1 × Set of vials with caps containing SEM stubs covered with double-sided adhesive carbon tape (Right Back, Right Palm, Left Back, Left Palm)
• 1 × Tamper-evident police evidence seal (for resealing after evidence collection)

Key specs

• Kit type: combination GSR kit supporting AA screen + SEM analysis pathway
• Swabs: 12 cotton-tipped, plastic-shaft swabs
• SEM stubs: 4 (Right Back, Right Palm, Left Back, Left Palm) with adhesive carbon tape
• Kit envelope size: approx. 15.2 cm × 22.9 cm
• Pack quantity: 10 kits per case

Handling & safety note

This kit includes a nitric acid solution. Always follow your organisation’s WHS requirements and laboratory procedures (including PPE and chemical handling protocols) and refer to the applicable safety documentation when handling reagents.

Frequently asked questions

What analysis workflow does this kit support?

It is designed to allow a quick GSR screen using Atomic Absorption (AA) and, if warranted, a more definitive analysis by Scanning Electron Microscopy (SEM).

What body areas does the kit support for SEM sampling?

The included SEM stubs are supplied in labelled vials for right/left hands and back/palm positions to support structured hand sampling.

How many kits are supplied?

10 kits per case.

Standardise GSR collection for AA + SEM workflows. Contact J3Seven to request a quote, confirm availability, and align deployment with your agency procedures and laboratory requirements.