pH Test Strips 4.0-9.0 Reflectoquant 1 PK *Requires RQflex 2 EMD# 16950-1

Purchase pH Test Strips 4.0-9.0 Reflectoquant 1 PK *Requires RQflex 2 EMD# 16950-1

pH Test Strips 4.0-9.0 Reflectoquant   1 PK *Requires RQflex 2 EMD# 16950-1 MSDS (Material Safety Data Sheet)

Reflectoquant® pH Test Strips

Purchase pH Test Strips 4.0-9.0 Reflectoquant 1 PK *Requires RQflex 2 EMD# 16950-1

  • Gallade Part#: 169961
  • Mfr Part#: 16996-1
  • Brand: EMD Chemicals EM Science
  • Container: 1 PK of 50 Strips

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  • Reflectoquant® pH 4.0-9.0 Test, Catalog No. 16996/1

    1. Method

    The pH value of a dilute solution is defined as the negative logarithm of hydrogen ion concentration expressed in molarity:

    pH = – lg (concentration H+

    Solutions are characterized as acidic, neutral or alkaline according to their pH:

    Solution Concentration H+ Concentration H+
      pH in mol/l
    acidic <7 >10-7
    neutral 7 10-7
    alkaline, basic >7 <10-7

    2. Method

    pH indicators chemically bound to the test zones (“nonbleeding” pH indicators) change their color depending on the pH value of the solution being analyzed. This change in color is evaluated reflectometrically.

    3. Measuring Range and Number of Determinations

    Measuring Range Number of Determinations
    pH 4.0 - 9.0 50

    4. Applications

    Sample Material:

    Aqueous solutions
    Cooling lubricants
    Food
    Soils

    5. Reagents and Auxiliaries

    The analytic test strips are stable at least up to the date stated on the pack when stored in closed tube at +15 to +25°·C.

    Package Contents:

    Tube containing 50 analytical test strips
    Bar code strips

    Other Reagents:

    Titristar® Buffer solution; pH 7.00, Cat. No. BX1632

    6. Preparation

    Extract solid samples by an appropriate method.

    7. Procedure

    · Observe the instructions for the RQflex Reflectometer.

    The following applies to the pH test:

    Measurement Procedure A. Stored reaction time: 10 sec.

    • Remove 1 analytical test strip and immediately reclose the tube.
    • Press START button of the reflectometer and at the same time immerse both reaction zones of the test strip in the sample solution (15-30°C) for approx. 2 sec.
    • Shake off excess liquid from the test strip
    • As soon as the beeper sounds (5 sec. before end of reaction time), insert the test strip all the way into the strip adapter with the reaction zones facing the display.
    • Read off the result from the display. The result is automatically stored.

    Note:

    At the end of each workday, cleanse the strip adapter thoroughly with water or ethanol.

    8. Method Control

    To check analytical test strips, equipment and procedure:

    Analyze above-mentioned buffer solution (approx 20°C) as described in section 7.

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