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The only CRMs designed and certified for PAL and PhotonAssay™

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CONFIDENCE

Certified For Method

PRECISION

Reliability & Accuracy

METHOD SPECIFIC

Use for PAL, PhotonAssay™ or Fire Assay

Engineered explicitly for large-mass analytical methods (like PAL and PhotonAssay™), CrushedCRMs™ are treated identically to routine samples during analysis, allowing greater precision and confidence in results.

CrushedCRMs™ are essential for laboratory methods that analyse a crushed sample, with the following advantages over pulverised CRMs:

Particle Size

The same particle size as crushed routine samples analysed.

Certification

Certified for PAL, PhotonAssay™ and Fire Assay or independently of any method.

Stability

For PhotonAssay™ quality control, they are stable over time.

Sample Prep

Tests the sample preparation process.

Truly Blind

Truly blind to analysis when submitted from the field.

Find Out More

What are IM Standards CrushedCRMs™?

Crushed Gold CRMs are ~3mm rock chips specifically produced using our patent-pending, in-house manufacturing process.

Engineered specifically for large mass analytical methods like PhotonAssay™ and PAL, they are the only CRMs designed for these laboratory techniques. They are certified and matrix-matched to routine samples.

Quality control programs for laboratory analysis rely on treating certified reference materials (CRMs) identically to routine samples. Matching the physical and chemical characteristics, method of use, and handling in all laboratory processes for both CRMs and routine samples develop superior confidence in the results.

Pulverised CRMs have been used for PhotonAssay™ and PAL, but they behave adversely compared to crushed samples. To solve this issue, CrushedCRMs™ have been developed as the essential quality control material for these laboratory. methods.

Produced under our 17034 accreditation, we guarantee the inter-comparability of measurement results worldwide and the highest level of quality assurance that an accredited impartial manufacturer can obtain.

Why Use for PhotonAssay™

The use of pulverised CRMs in PhotonAssay™ can be problematic.

Our CrushedCRM™ – Primary product provides further confidence in the PhotonAssay™ Quality Control program by unlocking the following solutions:

  • CrushedCRM™ – Primary has the same physical and bulk chemical properties as routine samples. The distribution of gold within the material is similar to a typical sample, located within the ~3mm particles.
  • CrushedCRM™ – Primary is stable. Pulverised gold CRMs are challenging to pack consistently into the PhotonAssay™ jar and exhibit variable packing density between jars and within jars over time, causing analytical bias.
  • CrushedCRM™ – Primary contains minimal fines, resulting in stable within-jar segregation of gold due to the elimination of gold-containing fine particle settling.
  • CrushedCRM™ – Primary exhibits repeatable and precise PhotonAssay™ jar fill properties and does not stick to the inside of the jar.
  • CrushedCRM™ – Primary is certified using a gravimetric method, therefore providing a completely independent assessment of PhotonAssay™ and restoring confidence in the technique. Neither our catalogue grades nor your tailored CrushedCRM™ product (Primary or Custom) have been used to build a PhotonAssay™ calibration, nor has their certified value been determined by a fire assay round-robin program.
  • CrushedCRM™ – Primary is manufactured to specific gold grades to cover the full analytical range of the technique, with targeted grades at cutoff and at low levels where PhotonAssay™ precision needs careful monitoring.

 

Using our CrushedCRM™ – Pre-Mixed product, PhotonAssay™ users can benefit from submitting a truly blind CRM from the field alongside RC or blast hole samples.

  • CrushedCRM™ – This Pre-Mixed product is available in aliquot masses up to 2kg so that the uncertainty contribution due to splitting and sub-sampling can be measured and added to the analytical error.
  • Due to its carefully designed level of internal (within-unit) heterogeneity, CrushedCRM™ – Pre-Mixed allows for the laboratory’s ability to load and pack the PhotonAssay™ jars to be assessed consistently in terms of quality and reproducibility.
  • CrushedCRM™ – Pre-Mixed can be truly blind when submitted to the lab from the field for analysis. All currently available pulverised gold CRMs with a PhotonAssay™ certification are controlled by the laboratories, and their properties are extensively recognised. CrushedCRM™ ensures your quality control program is controlled by you.

 

For a complete matrix-matched solution, CrushedCRM™ – Custom is a -3mm chip product that can be manufactured from clients’ ore. Our unique patent-pending manufacturing process makes it possible to engineer a CrushedCRM™ product while minimising the gold nugget effect, which ensures between-unit homogeneity is fit for purpose.

Why Use for PAL?

The use of pulverised CRMs in PAL can be problematic.

Our CrushedCRM™ – Pre-Mixed product restores confidence in the PAL technique by unlocking the following solutions:

  • CrushedCRM™ – Pre-Mixed offers a more precise solution based on CRM mass and grade.
  • CrushedCRM™ – Pre-Mixed are packaged at the aliquot size. They are a single-shot, ready-to-use product.
  • CrushedCRM™ —Pre-Mixed test the pulverisation step in the process, and the gold is leached over time, unlike pulverised gold CRMs, which will leach very quickly as the gold is already liberated.
  • CrushedCRM™ – Pre-Mixed can be submitted blindly to the lab from the field, unlike pulverised gold CRMs.
  • CrushedCRM™ – Pre-Mixed are designed and certified for the PAL method. Some gold will be retained in the tails, allowing for a more complete quality control program to be established from a single source.
  • CrushedCRM™ – Pre-Mixed are also certified by PhotonAssay™ and Fire Assay for total gold content.

 

The key benefits of using CrushedCRM for PAL are:

  • The CrushedCRM™ is pulverised and leached in the method like a routine sample.
  • CrushedCRMs™ are certified for PAL at the method aliquot mass.

Why Use for Fire Assay?

The use of Pulverised CRMs in Fire Assay can be problematic. CrushedCRMs™ bring the following solutions:

  • CrushedCRM™ – Pre-Mixed test for errors in preparation and are blind to the lab, unlike pulverised gold CRMs, which do not test for mistakes in preparation and are not blind to the lab.

 

Our Pre-Mixed product is specifically designed for Fire Assay. Our Custom product can also be designed for use in Fire Assay. The key benefits are:

  • They are truly blind to the lab as they are submitted with the drill samples.
  • The use of the Pre-Mixed 2kg tests the sample preparation.

Our Range

CrushedCRM™ comes in three different product solutions:

CrushedCRM™ – Pre-Mixed

Ready to use single-shot gold CRM certified for PAL and PhotoAssay™ at the method aliquot mass.

CrushedCRM™ – Primary

Manufactured to precise specifications with a Gravimetric Certified Value For PhotonAssay™.

CrushedCRM™ – Custom

Manufactured from mine site material for matrix-matched confidence.

For more detailed information on the key features, advantages and specifications of each product please download our brochure or speak to one of our technical experts.

Download Product Brochure
“

At Iluka Resources, we rely on reference materials for quality control monitoring of our laboratory processes during mineral sands exploration and processing. We first contacted Independent Mineral Standards (IMS) to prepare a batch of mineral sands reference materials. After evaluating the homogeneity of the batch provided by IMS, it became apparent that batches from our previous supplier required reprocessing. IMS has since reprocessed three batches of reference material for us, resulting in a significant decrease in typical relative standard deviation from 4.5% to 0.9%. By switching to IMS as our supplier, we have greatly improved our process control and quality control through the use of fit-for-purpose reference materials.

ILUKA RESOURCES
“

At Iluka Resources, we rely on reference materials for quality control monitoring of our laboratory processes during mineral sands exploration and processing. We first contacted Independent Mineral Standards (IMS) to prepare a batch of mineral sands reference materials. After evaluating the homogeneity of the batch provided by IMS, it became apparent that batches from our previous supplier required reprocessing. IMS has since reprocessed three batches of reference material for us, resulting in a significant decrease in typical relative standard deviation from 4.5% to 0.9%. By switching to IMS as our supplier, we have greatly improved our process control and quality control through the use of fit-for-purpose reference materials.

ILUKA RESOURCES
“

At Iluka Resources, we rely on reference materials for quality control monitoring of our laboratory processes during mineral sands exploration and processing. We first contacted Independent Mineral Standards (IMS) to prepare a batch of mineral sands reference materials. After evaluating the homogeneity of the batch provided by IMS, it became apparent that batches from our previous supplier required reprocessing. IMS has since reprocessed three batches of reference material for us, resulting in a significant decrease in typical relative standard deviation from 4.5% to 0.9%. By switching to IMS as our supplier, we have greatly improved our process control and quality control through the use of fit-for-purpose reference materials.

ILUKA RESOURCES

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