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Quality Control & Quality Assurance


Ledoux & Company is ISO 9001-2000 certified



 

 

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The market value of the shipments containing precious metals necessitates that the samples are accurately analyzed. At Ledoux & Co., accuracy is ensured by strict quality control measures. These measures include

  • Balances are maintained in good working order with regular calibration verification by authorized personnel. Twice a year maintenance visits are required from the manufactures of the weighing equipment.

  • Weights, thermometers and solution standards are traceable to the National Institute of Standards and Technology (NIST)

  • Volumetric flasks are Grade A or equivalent.

  • Instruments such as X-ray Fluorescence, Plasma Emission, Atomic Absorption, DC Arc, Spark source Mass Spectroscope, Leco Carbon Sulfur analyzer, Autotitration equipment and UV-Visible Spectrophotometer, are regularly serviced by qualified personnel and kept in good working order

  • Replicate sample portions are analyzed. An acceptable precision must be obtained before reporting.

  • Results are cross-checked by applying more than one method where possible.

  • Analysis are carried out on occasions by different personnel to ensure that no operator bias develops.

  • Quality Control samples obtained from reputable organizations, such as National Institute of Standards and Technology (NIST) and Canadian Certified Reference Materials Project (CCRMP) are regularly analyzed to ensure compliance.

  • Previously analyzed samples are occasionally re-submitted for analysis in-house to check repeatability of the procedure and the effectiveness of the analyst.

  • All results are compiled and then reviewed and approved by authorized personnel.

  • A report is only released to the client if the results are considered to be satisfactory.

  • A copy of the final report is always kept at the Ledoux and Co. headquarters in Teaneck, NJ. along with the verification data.

Ledoux & Company is an ISO 9001-2000 registered company since 2003.
Having now been through three semi-annual audits, we are keenly aware of what is expected as it pertains to documentation and quality programs from a laboratory providing services on an international basis.
Whether or not being ISO certified is important to you specifically, we cannot know, except to state that such certification implies that we have methods and operational procedures that are written, and followed, and that when change is necessary or errors/complaints occur, as they always do, that such is documented and remedied if necessary.
We have always been subject to some study because of our Nuclear services, and licensing requirements, and having the ISO standard applied to our facility is something that we are all proud of attaining and maintaining.
 
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