Programme

16 - 19 March 2025

The theme for the Assaying & Refining Conference is: Sampling and Analytical Methods for Improved Precious Metals Evaluation. We are pleased to feature two expert keynote speakers: Kim H. Esbensen who will be speaking on Unsubstantiated Complacency of the "Assay Exchange" Paradigm: Sampling Uncertainties with Hidden Economic Consequences; and Russ Calow who will be speaking on The Geochemical Laboratory Industry - 1980 to 2025: Where We Started and Where We Are Headed.

The official Conference programme is now live and available below.

HOUR

PROGRAMME

17:30 - 19:30

Start of Conference Mixer, Palace Suites, Royal Garden Hotel, sponsored by Alex Stewart International

HOUR

PROGRAMME

09:00 - 10:30

Session 1 - Introduction, Keynote Speech, and the Work of LBMA

Moderator: Neil Harby, Chief Technical Officer, LBMA

Chief Executive's Welcome and Remarks

Role of the Referees and History of Their Development

Keynote Speech: Unsubstantiated Complacency re. the “Assay Exchange” Paradigm

10:30 - 11:00

Break

11:00 - 12:30

Session 2 - Sampling

Moderator: Mike Hinds, Consultant, MHinds Analytical Consulting

Comparing Sampling Techniques for Gold Bullion Evaluation

Workplace Air - Sampling and Determination of Metals and Metalloids in Airborne Particulate

Precious Metals Distribution in Lead Buttons, an application study with SPARK optical emissions spectrometry.

Role of Sample Preparation in Spectroscopic Analysis of Metal Samples

12:30 - 13:30

Lunch Break, sponsored by Onsa Rafineri

13:30 - 15:00

Session 3 - Refining

Moderator: Vijayacitta Harvey, Head of Good Delivery, LBMA

Precious Metals Refining - A Pathway to a Sustainable Future

Towards sustainable recovery: Collaborative models for gold and copper valorisation from urban waste

HSR® - High Surface Refining: A New Development in the Precious Metal Refining Process

Industry 5.0 Applied to New Machinery for Gold and Silver Ingot Production

15:00 - 15:30

Break

15:30 - 17:00

Session 4 - Assaying 1

Moderator: Barbara Badiello, Laboratory Manager, MKS PAMP

Quantitative Determination of Silver Content Using Fire Assay: New proposal

A Collaborative Framework to Ensure Availability of Certified Reference Materials for Precious Metal Refineries

A Review of the LPPM & IPMI Platinum Sponge Analysis Round Robin

17:00

Close of Day One

18:30

Conference Dinner

HOUR

PROGRAMME

09:00 - 10:00

Session 5 - Keynote Speech

Moderator: Michael W. Hinds, Consultant, MHinds Analytical Consulting

The Geochemical Laboratory Industry 1980 to 2025: Where We Started and Where We Are Headed

10:00 - 11.15

Session 6 - GDL and Special Interest Topics

Moderator: Hannah Coakley, Physical & Technical Services Officer (LBMA)

The LBMA Good Delivery System - Update

Vijayacittā Harvey (Head of Good Delivery, LBMA)

Recreating of the Staffordshire Hoard Helmet, A collaboration of digital and traditional fine metal skills

Review of the Visual Guide to Good Delivery Bars and Weighing Guidelines

Neil Harby (Chief Technical Officer, LBMA)
Mike Hinds (Consultant, MHinds Analytical Consulting)

11:15 - 11:45

Break

11:45 - 13:00

Session 7 - Assaying 2

Moderator: Sandra Ratsoma, Senior Manager Technical Assurance and Laboratory, Rand Refinery SA

Unravelling the Origins of Gold: Two Geological Methods Face to Face

Ultrasound Testing on LGD Bars

Reliable Non-Destructive Testing of .99 > purity metals via multiple complementary testing procedures

13:00 - 14:00

Lunch Break, sponsored by Onsa Rafineri

14:00 - 15:15

Session 8: Assaying 3

Moderator: Simone Marsan, Head of the Analytical Laboratory, Argor-Heraeus SA

Factors Affecting Cupellation Loss for Gold and Silver Milligram Beads from Low Grade Material

A Closer Look at Gold Bullion Fire Assay

Optimization of Electrolytic Refining Processes: Advanced Monitoring of Liquids with ED-XRF

15:15 - 15:45

Break

15:45 - 16:40

Session 9: Assaying 4

Moderator: Alessandro Ruffoni, former LBMA Referee on behalf of Argor-Heraeus SA

Are There Further Challenges for ICP-OES in Precious Metals Beyond the ISO Regulations?

Recycled Gold – A technical & political journey

16:40 - 17:10

Session 10: Summary, and Question & Answer

Moderator: Neil Harby, Chief Technical Officer, LBMA

Simone Marsan, Argor-Heraeus SA, Switzerland
Barbara Badiello, MKS PAMP SA, Switzerland
Daniela Manara, Metalor Technologies, Switzerland
Hitoshi Kosai, Tanaka Kikinzoku Kogyu K.K., Japan
Madeleine Theron, Rand Refinery SA

17:10

Close of Conference

18:00

Conference Closing Reception

HOUR

PROGRAMME

Optional Activities

08:30 - 17:30

Bureau Veritas Commodities Tour

This tour is now full.

The Bureau Veritas Tour provides a rare opportunity to see experts at work in one of the leading metals and minerals laboratories in the world, providing a behind-the-scenes look into the world of testing, inspection and certification.

09:00 - 12:30

Sampling Workshop

This workshop is now full.

Depending on the amount and diversity of the material encountered, sampling errors are typically much larger than assaying errors, very often endangering representativity. How can you guarantee a representative sample and analytical result?

Kim H. Esbensen (Senior Consultant & Professor, KHE Consulting) will be leading a three-hour workshop on the Theory of Sampling, which will include:

  • Principles of the Theory of Sampling;
  • What happens in the critical 'before analysis' domain;
  • Which errors matter and what to do; and
  • Resolution - the universal standard DS3077:2024 (3. ed.).