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Meeting regulations in any industry, standards are essential for periodically checking the accuracy of equipment pieces. By comparing against the known values, output readings detect errors present and inform personnel adjustments are required. Once the settings of the manual or automatic instruments have returned to zero, the reestablished conditions will yield optimal working performance. Calibrating with concentrated standards eliminates the possibility that environmental changes will induce instrumental miscalculation when accuracy matters most.

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Calcinated petroleum coke - trace elements

Supplier: PROMOCHEM

This reference standard is intended primarily for use in the calibration of apparatus and the evaluation of techniques employed in the analysis of calcined petroleum coke and other materials with a similar matrix.

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Coal fly ash - constituents

Supplier: PROMOCHEM

These reference standard is intended for use in the evaluation of analytical methods used for the classification of coal fly ash and for the determination of constituent elements in coal fly ash or materials of a similar matrix.

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Trace elements in water, NIST-1643F

Supplier: PROMOCHEM

This reference standards are intended to use in the determination of trace elements in fresh water. The solution contains nitric acid at a volume fraction of approximately 2%, equivalent to an amount of substance concentration (molarity) of approximately 0,32 mol/l and also it simulates the elemental composition of fresh water.

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Hydrazine Sulphate Solution

Supplier: CUSTOM MADE CHEMICALS LAB

Hydrazine sulphate solution, : N/A

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Soil and sediment reference material for dioxin, PCB, pesticide, and other organic contaminant levels in soil

Supplier: PROMOCHEM

Natural matrix reference material (Soil) , : N/A

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Hard Drinking Water UK Low Level Metals

Supplier: PROMOCHEM

Hard drinking water UK low level metals, : N/A

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Reference materials, cloud point reference, VHG

Supplier: PROMOCHEM

These reference materials are intended for use in accordance with ASTM D2500 for the determination of the cloud point of petroleum products. The cloud point of a petroleum product is an index of the lowest temperature of their utility for certain applications.

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62,4 mg/ml CuSO₄.5H₂O

Supplier: CPACHEM

The colour standard is specially intended for use in testing ChP and monographs. This solution was produced according to the specifications using ChP reagent quality components and water meeting the ChP monograph requirement for purified water.