Sulfite Test Strips 10-200 ppm Reflectoquant 50 PK *Requires RQflex 2 EMD# 16950-1

Purchase Sulfite Test Strips 10-200 ppm Reflectoquant 50 PK *Requires RQflex 2 EMD# 16950-1

Sulfite Test Strips 10-200 ppm Reflectoquant   50 PK *Requires RQflex 2 EMD# 16950-1 MSDS (Material Safety Data Sheet)







Reflectoquant® Sulfite Test Strips

Reflectoquant® Sulfite Test, Catalog No. 16987/1

1. Method

SO32– ions react with a mixture of potassium hexacyanoferrate(II), zinc sulfate and sodium nitroprusside to form a pink to brick-red compound, the concentration of which is determined reflectometrically.

2. Measuring Range and Number of Determinations

Measuring Range1) Number of Determinations
10 - 200mg/l SO32– 50

1) for measurement of concentrations > 200 mg/l SO32– , see section 6

3. Applications

Sample Material:

Wastewater
Boiler water and boiler feed water
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 100 and 0mg/l SO32–. 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+ 10
Al3+ 100
Ascorbate 100
BO33- 1,000
Br- 1,000
Ca2+ 1,000
Cd2+ 1,000
Citrate 10
Cl- 1,000
CN- 10
CO32- 100
CrO42- 10
Cu2+ 10
Fe2+ 1
Fe3+ 1
K+ 1,000
Mg2+ 1,000
Mn2+ 10
NH4+ 1,000
Ni2+ 100
NO2- 1,000
NO3+ 1,000
Oxalate 1,000
PO43- 100
S2O32- 1,000
Tartrate 1,000
Zn2+ 10
EDTA 100
Anionic Surfactants1) 1,000
Cationic Surfactants2) 1,000
Nonionic Surfactants3) 1,000
H2O2 10
NaCl 2.5%
Na2SO4 2.5%

1)tested with Na-dodecyl sulfate

2)tested with N-cetylpyridinium chloride

3)tested with polyvinylpyrrolidone

5. Reagents and Auxiliaries

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

Other Reagents:

EM Quant® Sulfite Test Cat. No. 10013, measuring range 10-400mg/l SO32–
colorpHast® Universal indicator strips pH 0-14. Cat. No 9590
Sodium acetate trihydrate GR Cat. SX0255
Sodium sulfite anhydrous GR, Cat. No. SX0785
Titriplex® III EDTA dihydrate GR, Cat. 12029

6. Preparation

  • Check whether the sulfite content is within the measuring range. Use the EM Quant® Sulfite Test as a guide. Samples containing more than 200 mg/l SO32– must be diluted with distilled water.
  • · The pH must be within the range 7-11. Check with universal indicator strips. adjust pH, if necessary, with sodium acetate or dilute sodium hydroxide solution.

7. Procedure

  • Observe the instructions for the RQflex Reflectometer.

The following applies to the Sulfite Test:

Measurement procedure A. Stored reaction time: 30 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 pretreated sample solution (5-30°C) 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 SO32–. 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:

Dissolve 0.157g sodium sulfite and 0.040g Titriplex® III in distilled water make up to 100ml and mix. SO32– concentration 1,000mg/l. Dilute this standard solution to 100mg/l SO32– and analyze as described in section 7.

Purchase Sulfite Test Strips 10-200 ppm Reflectoquant 50 PK *Requires RQflex 2 EMD# 16950-1

  • Gallade Part#: 16987
  • Mfr Part#: 16987-1
  • Brand: EMD Chemicals EM Science
  • Container: 1 PK of 50 Strips

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