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    AQUADUR 4–21, for water hardness, box 91220

    Platform:    Semi-quantitative test strips
    Parameter:    Total hardness
    Brand:            AQUADUR
    Gradation:    Total Hardness - < 54 • >72 • > 126 • > 252 • > 378 ppm CaCO₃
    Color change:    Total hardness - green → red
    Evaluable on reflectometer:    No
    Additional reagent: No
    Storage temperature    4−30 °C
    Shelf life (from production):    2 Years

    AQUADUR Sensitive, for water hardness 91243

    AQUAUDR Sensitive water hardness test strips include all the same benefits as the classic AQUADUR test strips, but feature a special, very low measuring range.

    Total Hardness - 0 • 5.4 • 10.8 • 18.8 ppm CaCO₃

    AQUADUR® test strips are for the quick and easy determination of water hardness 91201

    AQUADUR® test strips are for the quick and easy determination of water hardness. The convenient dip & read procedure and the clear colour changes from green to red ensure reliable results within seconds.
    below 50 ppm CaCO3– very soft water
    50 – 120 ppm CaCO3– soft water
    120 – 240 ppm CaCO3 – medium hard water
    240 – 360 ppm CaCO3 – hard water
    above 360 ppm CaCO3– very hard water
    Scale gradation 0, 5, 10, 15, 20, 25 °d*

    Chlorine Test in freshwater and seawater 1.14670

    MERCK

    General description

    Method: colorimetric with color card 0.10 - 0.25 - 0.5 - 1.0 - 2.0 mg/l Cl₂ MQuant®
    This MQuant® Chlorine test (formally MColortest®) is suitable for the colorimetric determination using the easy to use color card. The reagents are added to the sample, resulting in a color reaction. The concentration is determined by allocating the color to a value on a reference scale.

     

    Malic Acid Test 116128

    MERCK

    function control: entspricht
    Assay
    - standard 1: 6.5 - 8.5 mg/l
    - standard 2: 22.5 - 27.5 mg/l
    - standard 3: 45.0 - 55.0 mg/l

    Method: reflectometric with test strips 5.0 - 60.0 mg/l Reflectoquant®
    The Reflectoquant Malic Acid Test can be used for the determination of the decrease in malic acid concentration during the wine-making process. Malic acid (malate) is oxidized to oxalacetate by NAD under the catalytic effect of malate dehydrogenase. In the presence of diaphorase the NADH formed in the process reduces a tetrazolium salt to a red formazan that is determined reflectometrically on the RQflex.

    Semi-quantitative test strips QUANTOFIX Chlorine Sensitive 91339

    Platform:    Semi-quantitative test strips
    Parameter:    Chlorine (total)
    Brand:    QUANTOFIX
    Gradation:    Chlorine (total) - 0 • 0.1 • 0.5 • 1 • 3 • 10  mg/L Cl₂
    Color change:    Chlorine - yellow → violet
    Evaluable on reflectometer:    QUANTOFIX Relax
    Instrumental measuring range:    Chlorine (total) - 0.1–10 mg/L Cl₂
    Method    Chlorine - Redox reaction
    Additional reagent:    Not
    Storage temperature:    4−30 °C
    Shelf life (from production):    2.5 Year(s)
    Scope of delivery    100 test strips in a tube, instruction leaflet
    Hazardous material:    No

    Semi-quantitative test strips QUANTOFIX Nitrate / Nitrite 91313

    Platform:    Semi-quantitative test strips
    Parameter:    Nitrate, Nitrite
    Brand:    QUANTOFIX
    Gradation:    Nitrate - 0 • 10 • 25 • 50 • 100 • 250 • 500  mg/L NO₃⁻, Nitrite - 0 • 1 • 5 • 10 • 20 • 40 • 80  mg/L NO₂⁻
    Color change:    Nitrate - white → red-violet, Nitrite - white → red-violet
    Evaluable on reflectometer:    QUANTOFIX Relax
    Instrumental measuring range:    Nitrate - 10–500 mg/L NO₃⁻, Nitrite - 0.5–80 mg/L NO₂⁻
    Method    Nitrate - Modified Griess reaction, Nitrite - Griess reaction
    Additional reagent:    Not
    Storage temperature:    4−30 °C
    Shelf life (from production):    2.5 Year(s)
    Scope of delivery    100 test strips in a tube, instruction leaflet
    Hazardous material:    No

    Semi-quantitative test strips QUANTOFIX Sulfate 91329

    Platform:    Semi-quantitative test strips
    Parameter:    Sulfate
    Brand:    QUANTOFIX
    Gradation:    Sulfate - < 200 • > 400 • > 800 • > 1200 • > 1600  mg/L SO₄²⁻
    Color change:    Sulfate - red → yellow
    Evaluable on reflectometer:    No
    Method:    Sulfate - Ba-thorine-complex
    Additional reagent:    Not
    Storage temperature:    4−30 °C
    Shelf life (from production):    2.5 Years
    Scope of delivery    100 test strips in a tube, instruction leaflet
    Hazardous material:    No

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