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Supplier: VWR Chemicals

Standard solution hydrazine, VWR®, 100 mg/l

Supplier: VWR Chemicals

Standard solutions of sodium carbonate.

Supplier: VWR Chemicals

PAH mix in acetonitrile, 16 components, VWR®

Supplier: VWR Chemicals

Potassium hydrogen phthalate solutions.

Supplier: VWR Chemicals

The reference standards are designed to check the accuracy and the reliability of the results. They are meant to provide reassurance that the photometer is working correctly.

Supplier: VWR Chemicals

A high quality analytical reagent manufactured and certified compliant for use in ASTM D 665 / IP 135 the Standard Test Method for Rust-Preventing Characteristics of Inhibited Mineral Oil in the Presence of Water.

Supplier: Avantor

Mixture (51 ml/bottle) of 2 mg/ml stearic acid and 2 mg/ml n-hexadecane in ULTRA RESIANALYZED acetone.

Supplier: VWR Chemicals

VWR® offers a complete range of products for the determination of the hydrocarbon oil index (HOI) in accordance with EN ISO 9377-2 (DIN H53).

Supplier: VWR Chemicals

These standards are ideal to use as control standards for COD measurements to verify that correct analysis for COD has taken place.

Supplier: HACH

Standard solution for accuracy checks in copper determinations.

Supplier: HACH

For accuracy checks in iron determinations.

Supplier: HACH

ISE standards are used to calibrate ion selective electrode measurement systems by coresponding the electrode output with the concentration of the analyte. Pairs of standards with concentrations that differ by a factor of ten are used for analysis.

Supplier: HACH

System for Analytical Quality Assurance (AQA), consisting of one combined standard/spiking solution and two round robin test solutions.

Supplier: HACH

Standard solution for accuracy checks in nickel determinations.

Supplier: HACH

Standard solution for accuracy checks in molybdenum determinations.

Supplier: HACH

Standard solution for accuracy checks in potassium determinations.

Supplier: RESTEK

Internal standard mix 8260, includes chlorobenzene-d5, 1,4-dichlorobenzene-d4, 1,4-difluorobenzene and pentafluorobenzene, 2500 μg/ml each , : N/A, Matrix: P&T Methanol

Supplier: HACH

For determination of ammonia and total kjeldahl nitrogen by the nessler method. Solutions are available in self-contained dropping bottle.

Supplier: HACH

TCMP - 2-chloro-6 (trichloromethyl) pyridine (N-Serve), coated on an inert substrate.

Supplier: U.S. PHARMACOPEIA

USP Reference Standards are specified for use in conducting official USP–NF tests and assays. USP also provides Reference Standards specified in the Food Chemicals Codex as well as authentic substances—high-quality chemical samples—as a service to analytical, clinical, pharmaceutical and research laboratories. To confirm accuracy and reproducibility, USP Reference Standards are rigorously tested and evaluated by multiple independent laboratories including USP, commercial, regulatory, and academic labs. USP also provide publicly available, official documentary standards for pharmaceutical ingredients in the USP–NF that link directly with our primary reference standards.

Supplier: HACH

Standard solution for accuracy checks in sulfate determinations.

Supplier: HACH

SpecCheck secondary gel standards sets, 0 - 2 mg/l Cl₂, For test kit(s): Chlorine (DPD) LR, 4 Vials

Supplier: HACH

For accuracy checks in chlorine determinations. Lot specific concentration displayed on label.

Supplier: HACH

These mixed standards are ready to use, no dilutions are required. They contain ammonia nitrogen, nitrate nitrogen, COD, phosphate, sulphate and TOC.

Supplier: HANNA

CAL Check™ Standard for Chlorine (free) 0,0 and 1,00 ppm, CAL Check™, : N/A

Supplier: HACH

Standard solutions for accuracy checks in manganese determinations.

Supplier: HACH

For accuracy checks in Biochemical Oxygen Demand (BOD) determinations.

Supplier: HACH

COD standard solution (NIST), 1000 mg/l

Supplier: HACH

Standard solutions for accuracy checks in silica determinations.

Supplier: HACH

Standard solution for accuracy checks in cobalt determinations.