FAQ
Here are your answers to the most frequently asked questions.
Our lab is located at 389 Franklin Avenue, Rockaway, NJ 07866. Please send your sample material to that address.
A properly prepared sample is key to successful analytical results. We require a homogeneous, representative sample that accurately reflects the whole lot. This means your material has been properly processed at a facility and samples were taken correctly. Depending upon the material, we will need 30-to-100-grams of 70-mesh ground material, and we will do the rest.
There are three-reasons:
- ISO 17025 Accredited & ISO 9001:2015 Certified: These credentials ensure that our results are accurate and precise. Additionally, all internal processes follow a detailed quality control system that can withstand detailed scrutiny. In simple terms, our credentials equal your peace of mind.
- Independent Laboratory: We are a family-owned business with one goal in mind: accuracy. We are laser-focused on delivering precise results based solely upon the scientific truth. We are unbiased, objective, and not swayed by any outside sources.
- Customer Focused: We treat our customers like family. We appreciate our worldwide clients who entrust us with the analysis of their precious materials. Our commitment, communication, and dedication to our customers are the foundation of our success.
Ledoux Metallurgical Testing Laboratory provides services in precious metals analysis (e.g., fire assay, gravimetric/wet chemistry, ICP), catalyst testing (spent, fresh, EO, VAM, petrochemical), copper concentrates, and electronic scrap (e-scrap), as well as on-site representation. The site also highlights fire assay, wet chemistry, and instrumental analysis as core methods.
Yes. We provide independent on-site inspecting, weighing, and sampling at processing facilities (your “eyes and ears”), documenting each step to mitigate risk (e.g., LOI/LOD).
Processing large amounts of material is not an easy task and comes with many risks. The main liability is the loss of material due to poor handling, quality variations, and possible theft. Any one of these issues can result in financial losses for all parties involved. The small investment of hiring an on-site weighing and sampling representative eliminates these potential threats and demonstrates our commitment to treating your materials as our own. Our on-site representative is your “eyes and ears” at the processing facility. He or she will ensure accuracy, eliminate risk, and keep you informed.
No, they are not the same process and are not interchangeable. They are very different.
Loss on Drying (LOD) and Loss on Ignition (LOI) are both analytical techniques that measure the weight change of a particular sample after a heating process has been applied. Even so, they are very different regarding the type of information they provide in relation to the sample.
LOD determines the moisture content of a sample by comparing its weight before and after drying. It is a non-specific technique that can also remove other volatile impurities like alcohol.
LOI determines the organic matter content of a sample by measuring the weight loss after heating it to a high temperature. It is commonly used in inorganic analytical chemistry and soil science to analyze minerals and soil.
Yes. Ledoux Metallurgical Testing Laboratory is ISO/IEC 17025:2017 accredited by ANAB (Certificate L2426) with a scope that includes PGM determinations on catalysts (ICP with Te collection), LOI/LOD, fire-assay-based determinations for Au/Ag, and copper concentrate analyses. The accreditation is maintained under the current scope (v008). In addition, we hold ISO 9001:2015 certification for “Sampling, Inspection, and Analysis of Ores, Concentrates, Alloys, and Precious-Metal-Bearing Materials.”
Our ISO 17025 accreditation and ISO 9001:2015 certification ensure consistently trustworthy results, validating our expertise, quality, and dependability. This international recognition confirms that we meet the highest standards, maintaining rigorous guidelines, procedures, and quality control measures that utilize NIST-traceable standards and trusted methods for accurate analysis.
Yes, you can view and download this documentation here.
Yes, you can view and download this documentation here.
Ores, concentrates, alloys, precious-metal-bearing scrap, catalysts (spent/fresh) and e-waste solutions. Contact us if yours is unusual.
No, we do not offer this service.
Yes, “On-Site Precious Metals Representation,” with on-site witnessing at processing facilities.
We accept a minimum of 2-grams of high-grade/value material
Detection limits depend on the material being analyzed; however, the typical detection limit is 10 ppm.
We are unable to accept raw material. All samples must be fully processed and ground to 70 mesh prior to submission.
For electronic scrap (E-Scrap):
We do not accept CPUs. All material must be fully processed, with all plastic components completely removed before submission.
389 Franklin Avenue, Rockaway, NJ 07866, United States.
Phone: (201) 837-7160
- Lab Office
- Ledoux & Co.
- 389 Franklin Avenue, Rockaway, NJ 07866
- (201) 837-7160
Depending upon the material, 5-to-12-business days.
Yes, we are always looking for new team members. Please email your resume to info@ledoux.com.
Yes. We are ISO 17025 accredited and ISO 9001:2015 certified (link to that document).
You may use any major, reliable shipping carrier to send materials to Ledoux & Company. We recommend selecting a carrier that provides tracking and delivery confirmation to ensure safe and timely arrival of your shipment.
- IPMI facilities for processing
For materials requiring processing, you may use IPMI-approved processing facilities. - Incoming sample material requirements. All submitted samples must meet the following criteria:
Approximately 50 grams per sample
Ground to 200 mesh
Completely dried (wet or damp material cannot be accepted)