QC1388
Demand - WS
certified reference material
Přihlásitk zobrazení cen stanovených pro organizaci a smluvních cen
About This Item
UNSPSC Code:
41116107
NACRES:
NA.24
Doporučené produkty
grade
certified reference material
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.
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.
Analyt
Popis
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
12 - Non Combustible Liquids
wgk_germany
nwg
flash_point_f
Not applicable
flash_point_c
Not applicable
Vyberte jednu z posledních verzí:
Již tento produkt vlastníte?
Dokumenty související s produkty, které jste v minulosti zakoupili, byly za účelem usnadnění shromážděny ve vaší Knihovně dokumentů.
Zákazníci si také prohlíželi
Náš tým vědeckých pracovníků má zkušenosti ve všech oblastech výzkumu, včetně přírodních věd, materiálových věd, chemické syntézy, chromatografie, analytiky a mnoha dalších..
Obraťte se na technický servis.