Matrix certified reference material for sewage sludge.

This is a simplified version of the former CRM CZ 70006. Certified values for the most stable analytes have been experimentally confirmed in three laboratories.

The total toxicity equivalent is approximately 150 ng/kg.

• Price: 8,717.00 CZK excluding VAT
• Analytes: 2,3,7,8 TeCDD; 1,2,3,7,8 PeCDD; 1,2,3,4,7,8 HxCDD; 1,2,3,4,7,8 HxCDD; 1,2,3,6,7,8 HxCDD; 1,2,3,4,8,9 HxCDD; 1,2,3,4,6,7,8 HpCDD; OCDD; 2,3,7,8 TeCDF ; 1,2,3,7,8 PeCDF; 2,3,4,7,8 PeCDF; 1,2,3,74,7,8 HxCDF; 1,2,3,6,7,8 HxCDF; 1,2,3,7,8,9 HxCDF; 2,3,4,6,7,8 HxCDf; 1,2,3,4,6,7,8 HpCDF; 1,2,3,4,7,8,9 HpCDF; OCDF; PCB 77; PCB 81; PCB 126; PCB 169; PCB 105; PCB 114; PCB 118; PCB 123; PCB 156; PCB 157; PCB 167; PCB 189.

Packaging:

60 g of waste sludge in powder form with particle size below 100 μm in a dark glass bottle.

The sample is radiation stabilised with a dose of 25 kGy.

Use:

This certified reference material is intended to provide metrological continuity, validation of analytical methods and assignment of values to other materials of similar composition.

Recommended analytical methods for measured quantities:

• HRGC/HRMS

Specifications:

• Expiration date: 5 years from date of manufacture

Metrological continuity:

The majority of laboratories used the BCR 614(S0-S5) certified reference material for calibration, followed by BCR 365 and ERM AC 820-822 materials. All laboratories analyzed the BCR-677 matrix certified reference material at the same time as the samples provided.

Sample preparation for analysis:

The following EPA procedures 1613, 1668, 8280A, 8290 or equivalent methods are most commonly used.

Homogeneity and stability:

Homogeneity and short-term stability have been demonstrated, according to TNI guideline ISO 35.

Storage and instructions for use:

The CRM must be stored and kept in its original packaging at 2-30°C. The material shall be be analysed as delivered and its dry weight should be determined in unanalysed proportions by drying at 105°C to constant weight. It is recommended that the material in the vial be rehomogenised by mechanical shaking of the contents before each use. The vial should be opened 1-2 minutes after rehomogenisation to prevent fine dust particles from escaping from the vial and settling into the surroundings. As this is a toxic material, only personnel trained to handle toxic materials should handle the material.

Certified and indicative values and their uncertainties:

Certified values for selected PCDDs, PCDFs and PCBs are given in Table 1. The certified values of the analytes were derived from the results of an inter-laboratory comparison in which a total of 11 selected laboratories participated. These combined uncertainties are dominated by the contribution of uncertainty in the characterisation of the respective property value.

Analytical: Table 1: Certified values for selected PCDDs, PCDFs, PCBs and their associated uncertainties

Note:

More detailed information on the preparation, homogeneity assessment, stability and characterization of this CRM is provided in the certification report, which is available to interested parties upon request.