Remarks:
This material was prepared from a single batch of commercially available high purity glycine and is dispensed as 0.5g units in 4mL amber screw top vials. Vials should be stored at (20 ± 5) °C, in the original vial until it is first required.

Intended Use:
This material is intended for use in the calibration of instruments, the validation of new methods and the monitoring of the performance of methods used for the determination of carbon isotope ratios. It can also be used for the training and evaluation of staff.

CRM Certificate:  ERM-AE672a.pdf

Producer: (click for contact & purchase details)
 LGC Limited, (United Kingdom)

This material is produced under a valid ISO 17034 accreditation | This material is linked to statutory activities as a national metrology institute (NMI) / a designated institute (DI)

Remarks:
The identity of the material was confirmed b 500 MHz H-NMR spectroscopy. The material is supplied in 100mg portions packaged in 4mL amber glass vials with screw caps. While unopened, and once opened, the vial should be stored in a secondary container with a desiccant at (5±4)°C.

Intended Use:
The primary use of this reference material is for the calibration of methods for the determination of leucomalachite green in fish and other relevant matrices.

CRM Certificate:  ERM-AC303a.pdf

Producer: (click for contact & purchase details)
 LGC Limited, (United Kingdom)

This material is produced under a valid ISO 17034 accreditation | This material is linked to statutory activities as a national metrology institute (NMI) / a designated institute (DI)

Remarks:
A batch of digoxin was mixed and dispensed as 500 mg units into crimp-capped glass vials. This material is stored at (5±4) °C in the closed original vial.

Intended Use:
This reference material is intended for use in the validation, calibration and monitoring of methods to determine digoxin content, including methods commonly used in clinical laboratories for digoxin in human blood samples. It can also be used in the training and evaluation of staff.

CRM Certificate:  ERM-AC200a pdf.pdf

Producer: (click for contact & purchase details)
 LGC Limited, (United Kingdom)

This material is produced under a valid ISO 17034 accreditation | This material is linked to statutory activities as a national metrology institute (NMI) / a designated institute (DI)

Remarks:
Human serum from donors was filtered to remove particulates below 0.2 µm. Digoxin in methanol was added to give a final target concentration near the upper decision level in serum digoxin monitoring. The material was subjected to one freeze-thaw cycle and filtered through a 0.2µm Pall filter to remove oxalates. 1 mL of the resulting solution was sub-sampled into 3mL plastic screw-cap vials and stored at (-70 ± 10) º C.

Intended Use:
This reference material is intended for use in the validation of new methods and monitoring the performance of methods commonly used in clinical laboratories to determine the digoxin content of human serum samples. It can also be used in the training and evaluation of staff.

CRM Certificate:  ERM-DA200a.pdf

Producer: (click for contact & purchase details)
 LGC Limited, (United Kingdom)

This material is produced under a valid ISO 17034 accreditation | This material is linked to statutory activities as a national metrology institute (NMI) / a designated institute (DI)

Remarks:
Wheat flour was cleaned with water milled at 18 - 20ºC and 60% humidity. Sieved twice to a particle size of 140µm. The material was sub-sampled into 30 mL amber glass bottle with tamper-evident screw caps.

Intended Use:
Validation of methods for the determination of selenium and selenomethionine in food materials and dietary supplments.

CRM Certificate:  ERM-BC210a pdf.pdf

Producer: (click for contact & purchase details)
 LGC Limited, (United Kingdom)

This material is produced under a valid ISO 17034 accreditation | This material is linked to statutory activities as a national metrology institute (NMI) / a designated institute (DI)

Remarks:
Human Serum from donors was filtered to remove particulates below 0.2 µm. Digoxin in methanol was added to give a final target concentration, near the lower decision level in serum digoxin monitoring (0.8µg/L). The material was subjected to one freeze-thaw cycle and filtered through a 0.2µm Pall filter to remove oxalates. 1 mL of the resulting solution was aliquoted into 3mL plastic screw-cap vials and stored at (-70 ± 10) º C

Intended Use:
This reference material is intended for use in the validation of new methods and monitoring the performance of methods commonly used in clinical laboratories to determine the digoxin content of human serum samples. It can also be used in the training and evaluation of staff.

CRM Certificate:  ERM-DA201a.pdf

Producer: (click for contact & purchase details)
 LGC Limited, (United Kingdom)

This material is produced under a valid ISO 17034 accreditation | This material is linked to statutory activities as a national metrology institute (NMI) / a designated institute (DI)

Remarks:
The powder form of a commercially-available food supplement of chromium-enriched yeast with a certified value for total chromium (305.5 mg/kg) and an indicative value for Cr(III) (302 mg/kg) Sub-sampled as 7 g units into 15 mL amber glass bottle with tamper-evident screw caps.

Intended Use:
Validation and performance monitoring of methods for the quantification of total chromium yeast.

CRM Certificate:  ERM-BD213a pdf.pdf

Producer: (click for contact & purchase details)
 LGC Limited, (United Kingdom)

This material is produced under a valid ISO 17034 accreditation | This material is linked to statutory activities as a national metrology institute (NMI) / a designated institute (DI)

Remarks:
Soft drinking water was sourced from the Bury potable mains supply and filtered through a set of 8μm, 1.2μm and 0.45μm in-line filters and acidified by addition of nitric acid to give a final concentration of approximately 0.1% nitric acid and pH <2.0. High purity metal standards were used to spike the base material to reach the target levels, reflecting the regulatory limits. The material was bottled into 250mL portions in screw caps, high density polyethylene bottles and stored at 5 ± 4 °C.

Intended Use:
This reference material is primarily intended for use in the development, validation or quality control of analytical methods for the determination of metals in soft drinking water. The material may also be applicable to other similar matrices where more closely matched reference materials are not available

CRM Certificate:  LGC6027 pdf.pdf

Producer: (click for contact & purchase details)
 LGC Limited, (United Kingdom)

This material is produced under a valid ISO 17034 accreditation | This material is linked to statutory activities as a national metrology institute (NMI) / a designated institute (DI)

Remarks:
Butylated Hydroxyanisole (BHA) was ground and passed through a 710 um see, mixed and dried of Phosphorous Pentoxide. The material is supplied as 0.5 g units in screw-capped amber glass vials. The material should be stored at ambient temperature in a dark, dry place in the original closed vial until required for use.

Intended Use:
The material is primarily intended for use as a calibration standard in methods of analysis for BHA in foodstuffs and other relevant matrices.

CRM Certificate:  ERM-AC301a pdf.pdf

Producer: (click for contact & purchase details)
 LGC Limited, (United Kingdom)

This material is produced under a valid ISO 17034 accreditation | This material is linked to statutory activities as a national metrology institute (NMI) / a designated institute (DI)

Remarks:
A batch of solvent yellow 124 was purified by column chromatography. It was then homogenised in propan-2-ol by stirring for 2 hours at room temperature. This material is dispensed as 200 mg units, stored in 4 mL screw cap amber glass vials and is kept at (5 ± 4) °C.

Intended Use:
This material is intended for the use an an analytical standard for the determination of SY124 in fuel.

CRM Certificate:  ERM-AC316a.pdf

Producer: (click for contact & purchase details)
 LGC Limited, (United Kingdom)

This material is produced under a valid ISO 17034 accreditation | This material is linked to statutory activities as a national metrology institute (NMI) / a designated institute (DI)