pH Test Strips 1-5 1.0-5.0 Reflectoquant 1 EA *Requires RQflex 2 EMD# 16950-1

Purchase pH Test Strips 1-5 1.0-5.0 Reflectoquant 1 EA *Requires RQflex 2 EMD# 16950-1

pH Test Strips 1-5 1.0-5.0 Reflectoquant   1 EA *Requires RQflex 2 EMD# 16950-1 MSDS (Material Safety Data Sheet)

Reflectoquant® pH Test Strips

Purchase pH Test Strips 1-5 1.0-5.0 Reflectoquant 1 EA *Requires RQflex 2 EMD# 16950-1

  • Gallade Part#: 168941
  • Mfr Part#: 16894-1
  • Brand: EMD Chemicals EM Science
  • Container: 1 PK of 50 Strips

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  • Reflectoquant® pH 1.0-5.0 Test, Catalog No. 16894/1

    Definition

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

    pH = -lg (H* concentration)

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

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

    1. 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 Range1) Number of Determinations
    pH 1.0 - 5.0 50

    4. Applications

    Sample Material:

    Aqueous solutions
    Food

    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
    2 Bar code strips

    Other Reagents:

    Titristar® Buffer solution ready for use, pH 2.00, Cat. No. BX1652
    Titristar® Buffer solution ready for use, pH 4.00, Cat. No. BX1634

    6. Preparation

    Extract solid samples by an appropriate method.

    7. Procedure

    The measurement with this pH test can be performed only with the reflectometers RQflex 2 and RQflex plus.

    Observe the manual for the reflectometer. The following applied to this pH test:
    Measurement Procedure A
    Stored reaction time: 15 sec

    • Remove 1 analytical test strip and immediately reclose the tube.
    • Press START button of the reflectometer and - this is imperative - at the same time immerse both reaction zones of the test strip in the measurement solution (15-25°C) for approximately 2 sec.
    • Vigorously 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:

    If another Reflectoquant® test was used prior to this pH determination, the strip adapter should be cleansed thoroughly with water or ethanol.
    Cleaning is also necessary at the end of each workday.

    8. Method Control

    To check analytical test strips, equipment and procedure:

    Analyze one of the above-mentioned buffer solution (approximately 20°C) as described in section 7.

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