VWR®, Total Nitrogen Standards (CRMs)

: VWR Chemicals

VWR®, Total Nitrogen Standards (CRMs)

: VWR Chemicals

Certified reference materials for use as standards for Total Nitrogen, typically used as standards for Kjeldahl nitrogen determination.

Standard solutions for photometric applications acc EN 25663 (ISO 5663) and ISO 7150
Traceable to SRM from NIST

Shelf life: 24 months (12 months after opening)

: Certified Reference Material acc ISO 17025 / ISO 17034

Frequently Bought Together

Quantitative filter papers, hardened ashless grades, grade 541, Whatman™

: Whatman products (Cytiva)

Nitrogen (total) CRM, Standard Solutions, Supelco®

: Merck

Buffer solutions, ready to use, referenced at 20 °C, Certipur®, Supelco®

: Merck

VWR®, Nitrile Gloves

: VWR Collection

Potassium chloride 3 mol/l (3 N) in aqueous solution, Supelco®

: Merck

Nitrate standard solution, 1000 mg/L NO₃<sup>-</sup> in Water (from NaNO₃) Certipur®, Supelco®

: Merck

Methanol ≥99.9% (by GC), HiPerSolv CHROMANORM® for LC-MS, suitable for UPLC/UHPLC instruments

: VWR Chemicals

Acetone ≥99%, TECHNICAL

: VWR Chemicals

Acetonitrile, anhydrous (max. 0.003% H₂O) ≥99.95%, HiPerSolv CHROMANORM® Reag. USP, Reag. Ph. Eur., ACS, super gradient grade suitable for UPLC/UHPLC instruments

: VWR Chemicals

Acetonitrile ≥99.9%, LiChrosolv® Reag. Ph. Eur., gradient grade for liquid chromatography, Supelco®

: Merck

VWR®, Total Nitrogen Standards (CRMs)

: VWR Chemicals

VWR® AVS TITRINORM Buffer Solutions, 20 °C

: VWR Chemicals

Heptane (mixture of isomers), TECHNICAL

: VWR Chemicals

Hydrochloric acid 1 mol/l (1 N), Titripur® Reag. USP, Reag. Ph. Eur. volumetric solution, Supelco®

: Merck

Test kits, photometric, Nitrate, LCK cuvette tests

: HACH