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VWR® Buffer, Ammonium Chloride, pH 10, Reag. Ph.Eur.

Catalog Number: (85739.290)

Supplier: VWR Chemicals

Description: The reagent is specially intended for use in testing Ph Eur and monographs. This solution was produced according 4.1.1 of Ph Eur specifications using Ph Eur reagent quality components and water meeting the Ph Eur monograph requirement for purified water.

UOM: 1 * 1 L

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Buffer HF-Improved

Supplier: Thermo Fisher Scientific

Description: Buffer used for pretreatment of planar silicon devices when plating with nickel plating solution products 44069 and 44070.

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VWR®, Total Hardness Indicator, Tablets for Hardness of Water Determinations, Avantor

Supplier: VWR Chemicals

Description:

Indicator tablets for determination of water hardness by titration with EDTA.

Specifications
Minimum weight: ≥ 0.20 g
Maximum weight: ≤ 0.23 g
Disintegration time (at 25°C): ≤ 150 s
Application test: conforms

The tablets are dissolved in 100 ml of the water sample to be tested, which has been buffered at pH 10 with 1 ml of Ammonia/ Ammonium chloride buffer solution, and then titrated with EDTA solution (0,01 M) till the sample turns from red to blue.
Total hardness in mg/l = 10×ml of titrant used.

Control samples of calcium carbonate should be used to calibrate the method.

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VWR® pHenomenal® MD 8000 H Multi-Parameter Instruments, Handheld

Supplier: VWR Collection

Description: These digital meters combine six parameters in one instrument: pH, mV, temperature, conductivity, dissolved oxygen and turbidity. IDP technology optimises use and makes measurement easier (no need to recalibrate when changing the meter and no need to adjust the meter’s settings). The measured data is complete with serial number, settings and calibration data.