Phosphate Test Strips 10-500 ppm EM Quant (1 PK of 100) HAZMAT fee incl

Purchase Phosphate Test Strips 10-500 ppm EM Quant (1 PK of 100) HAZMAT fee incl

Phosphate Test Strips 10-500 ppm EM Quant (1 PK of 100) HAZMAT fee incl MSDS (Material Safety Data Sheet)

EM Quant Phosphate Test, General Instruction, Cat No 10428

EM Quant® Phospate Test (PMB), Catalog No. 10428/1

1. Method

In a solution acidified with sulfuric acid, orthophosphate ions (PO43-) and molybdate ions form molybdophosphoric acid, which is reduced to phosphomolybdenum blue (PMB). The concentration of phosphate is measured semiquantitatively by visual comparison of the reaction zone of the test strip with the fields of a color scale.

2. Measuring Range and Number of Determinations

Measuring Range/Color Scale Graduation1) Number of Determinations
10-25-50-100-250-500mg/l PO43-
3.3-8.2-16-33-82-163mg/l P
7.5-19-37-75-187-374mg/l P2O5
100

1) for conversion factors see section 8
for measurement of concentrations >500mg/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 1000 mg/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 100
Al3+ 1000
Ascorbate 1000
BO33+ 1000
BR- 1000
Ca2+ 1000
Cd2+ 1000
Citrate 1000
Cl- 1000
CN- 1000
CO32- 1000
Cr3+ 250
CrO42- 250
Cu2+ 250
Fe2+ 100
Fe3+ 100
K+ 1000
Mg2+ 1000
Mn2+ 1000
NH4+ 1000
Ni2+ 1000
NO2- 10
NO3 1000
Oxalate 1000
S2O32- 1000
Tartrate 1000
Anionic surfactants1) 500
Cationic surfactants2) 100
Nonionic surfactants3) 100
H2O2 500
NaCl 5%
Na2SO4 5%
1) tested with Na-dodecyl sulfate
2) tested with N-cetylpyridinum chloride
3) tested with polyvinylpyrrolidone

5. Reagents and Auxiliaries

Please note the warnings on the packaging materials!

The analytical test strips are stable at least up to the date stated on the pack when stored in the closed tube at +15 to +825°C.
Package Contents:

Tube containing 100 analytical test strips
1 bottle of reagent PO4-1
1 test vessel

Other Reagents:
Phosphate standard solution ready for use, 1000mg/l PO43-, Cat. No. 19898.

6. Preparation

Samples containing more than 500mg/l PO43- must be diluted with distilled water.

7. Procedure

  • Remove 1 analytical test strip and immediately reclose the tube.
  • Immerse the reaction zone of the test strip in the measurement solution for 1 second.
  • Shake off excess liquid from the test strip, then place 1 drop of reagent PO4-1 on the reaction zone.
  • After 15 seconds, shake off excess reagent from the strip. Attention! Reagent contains sulfuric acid!)
  • Wait a further 60 seconds, then compare the color of the reaction zone with the color fields on the label. Determine with which field the color of the reaction zone coincides most exactly and read off the corresponding concentration value. If an exact color match cannot be achieved, estimate an intermediate value.

Note:

  • The color of the reaction zone may continue to change after the specified reaction time has elapsed. This must not be considered in the measurement.
  • If the color of the reaction zone is equal to or more intense than the color field for 500mg/l, the PO43-, concentration may actually be considerably higher. For this reason, in such cases the measurement should be repeated using fresh, gradually diluted samples until the warning zone no longer reacts and a value less than 500mg/l PO43- is obtained.

8. Conversions

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

9. Method Control

To check analytical test strips and procedure:
Dilute phosphate standard solution to 100mg/l PO43- and analyze as described in section 7.

Purchase Phosphate Test Strips 10-500 ppm EM Quant (1 PK of 100) HAZMAT fee incl

  • Gallade Part#: 10428-1
  • Mfr Part#: 10428-1
  • Brand: EMD Chemicals EM Science
  • Container: 1 PK of 100 Strips
  • Misc: HAZMAT UN3264 PGII CORROSIVE
  • CAS Number: Mixture

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