Phosphate Test Strips 5-120 ppm Reflectoquant 50 PK *Req RQflex 2 #16950-1 HAZMAT 16978-1 EMD

Purchase Phosphate Test Strips 5-120 ppm Reflectoquant 50 PK *Req RQflex 2 #16950-1 HAZMAT 16978-1 EMD

Phosphate Test Strips 5-120 ppm Reflectoquant   50 PK *Req RQflex 2 #16950-1 HAZMAT 16978-1 EMD MSDS (Material Safety Data Sheet)

Reflectoquant® Phosphate Test Strips

Purchase Phosphate Test Strips 5-120 ppm Reflectoquant 50 PK *Req RQflex 2 #16950-1 HAZMAT 16978-1 EMD

  • Gallade Part#: 169781
  • Mfr Part#: 16978-1
  • Brand: EMD Chemicals EM Science
  • Container: 1 PK of 50 Strips
  • Misc: HAZMAT UN2796 PGII

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  • Reflectoquant® Phosphate Test, Catalog No. 16978/1

    1. Method

    In a solution acidified with sulfuric acid orthophosphate ions (PO43–) and molybdate ions form molybdophosphoric acid. This is reduced to phosphomolybdenum blue (PMB), the concentration of which is determined reflectometrically.

    2. Measuring Range and Number of Determinations

    Measuring Range1) Number of Determinations
    5.0 - 12 mg/l PO43-
    1.6 - 39.1 mg/l P
    52.5 - 1,260 mmol/m3 PO43- or P
    3.7 - 89.6 mg/l P2O5
    50

    1) for conversion factors see section 8

    for measurement of concentrations > 120 mg/l PO43– see section 6

    3. Applications

    This test measures only orthophosphate. Samples must be decomposed before total phosphate can be measured.

    Sample Material:

    Wastewater

    Soils and fertilizers

    Food

    4. Influence of Foreign Substances

    This was checked - in the case of interfering ions up to concentrations of 1,000mg/l - in solutions containing 50 and 0mg/l PO43–. The concentrations of foreign substances given in the table lie below the limit at which the determination is interfered with:

    Concentrations of Foreign Substances in mg/l or %

    Ag+ 1,000
    Al3+ 1,000
    Ascorbate 1,000
    BO33- 1,000
    Br- 1,000
    Ca2+ 1,000
    Cd2+ 100
    Citrate 1,000
    Cl- 1,000
    CN- 1,000
    CO32- 1,000
    Cr3+ 100
    CrO42- 10
    Cu2+ 10
    Fe2+ 10
    Fe3+ 10
    K+ 1,000
    Mg2+ 1,000
    Mn2+ 1,000
    NH4 1,000
    Ni2+ 1,000
    NO2- 10
    NO3- 1,000
    Oxalate 1,000
    SO32- 1,000
    S2O32- 1,000
    Tartrate 1,000
    Anionic Surfactants1) 1,000
    Cationic Surfactants2) 100
    Nonionic Surfactants3) 100
    H2O2 100
    NaCl 10%
    Na2SO4 10%

    1)tested with Na-dodecyl sulfate

    2)tested with N-cetylpyridinium chloride

    3)tested with polyvinyl pyrrolidone

    5. Reagents and Auxiliaries

    Please Note the Warnings on Labels!
    Store originally sealed pack in refrigerator. Opened pack: store closed tube outside refrigerator in a cool and dry place. The analytic test strips are stable at least up to the date stated on the pack when stored in these conditions.

    Package Contents:

    Tube containing 50 analytical test strips
    Bar code strip

    1 bottle of reagent PO4–1
    1 test vessel

    Other Reagents:

    colorpHast® Universal indicator strips pH 0-14. Cat. No 9590
    Titristar® Sodium hydroxide solution 1 mol/l, Cat. No. SX0607H
    Sulfuric acid 0.5 mol/l Cat. No. SX1243H
    Phosphate standard solution ready for use, 1,000 mg/l PO43–, Cat. No. 19898

    6. Preparation

    • Check whether the phosphate content is within the measuring range. Samples containing more than 120mg/l PO43–, must be diluted with distilled water.
    • · The pH must be within the range 4-10. Check with universal indicator strips. If pH is lower than 4, add sodium hydroxide solution dropwise; if greater than 10, add sulfuric acid dropwise.

    7. Procedure

    • Observe the instructions for the RQflex Reflectometer.

    The following applies to the Phosphate Test:

    Measurement procedure A. Stored reaction time: 90 sec.

    • Rinse the test vessel several times with the pretreated sample solution (15-30°C). Then fill to the 5ml mark.
    • Add 10 drops of reagent PO4–1 and swirl.
    • 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 measurement solution for approx. 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 in mg/l PO43–. The result is automatically stored.

    Note:

    • If the test strip is inserted into the adapter after the reaction time has expired, renewed depression of the START button will result in a false-high reading of the phosphate concentration.
    • At the end of each workday, cleanse the strip adapter thoroughly with water or ethanol.

    8. Conversions

    Units Required = Units Given x Conversion Factor
    mg/l m3 PO43-or P mg/l PO43- 10.5
    mg/l P mg/l PO43- 0.326
    mg/l P2O5 mg/l PO43- 0.747
    mg/l m3 PO43- mmol/m3 PO43- or P 0.095
    mg/l m3 PO43- mg/l P 3.07
    mg/l m3 PO43- mg/l P2O5 1.34

    9. Method Control

    To check analytical test strips, equipment and procedure:

    Dilute phosphate standard solution to 50 mg/l PO43– and analyze as described in section 7.

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