Merck
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QC1388

Supelco

Demand - WS

certified reference material

NACRES:
NA.24

grade

certified reference material

Quality Level

CofA

current certificate can be downloaded

packaging

ampule of 20 mL

manufacturer/tradename

RTC QCI-233

concentration

100% in H2O

technique(s)

TOC: suitable

application(s)

environmental

format

matrix material

storage temp.

2-30°C

General description

This Certified Reference Material (CRM) is produced and certified in accordance with ISO 17034 and ISO/IEC 17025. All information regarding the use of this CRM can be found on the certificate of analysis.

Preparation Note

This PT sample is packaged as a 20 mL concentrate. The solvent for this sample is water. The PT sample has been autoclaved for preservation.
To prepare solution, partially fill a 1-L volumetric flask with reagent-grade water. Open ampule PE1388 (be careful to avoid cuts on glass) and transfer 10 mL from the ampule into the flask. Fill the volumetric flask to volume with reagent-grade water and mix well. The sample is now ready for immediate analysis. Analyze the solution to determine BOD or CBOD first. If COD and TOC cannot be determined within two hours after sample preparation, an aliquot should be preserved (pH<2) using 0.2 mL of concentrated sulfuric acid per 100 mL. This aliquot should be stored at 4 degrees Celsius and analyzed as soon as possible within the 28-day maximum holding time.
NOTES: For proper oxygen depletion of BOD and CBOD, the sample should be tested in a dilution series. Use a natural surface water or diluted domestic sewage for seeded dilution water and avoid entrainment of air. For analysis of CBOD, the use of a nitrifying inhibitor is recommended. Be sure to determine the "blank" BOD of your seeded dilution water so that the proper seed correction can be made.

Other Notes

Values of analytes vary lot to lot. Some lots may not contain all analytes.

Analyte

Description

    5-day BOD 5 - 50 mg/L
    Carbonaceous BOD (CBOD) 5 - 50 mg/L
    Chemical oxygen demand (COD) 5 - 75 mg/
    Total organic carbon (TOC) 1 - 50 mg/L

Storage Class Code

12 - Non Combustible Liquids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

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