Peroxide Test Strips 0.5-25 ppm EM Quant (1 PK of 100) 10011-1 EMD

Purchase Peroxide Test Strips 0.5-25 ppm EM Quant (1 PK of 100) 10011-1 EMD

MSDS (Material Safety Data Sheet)

EM Quant® Peroxide Test, Catalog No. 10011 Test strips and reagent for the detection and semi-quantitative determination of peroxides General The Peroxide Test detects inorganic and organic compounds containing a peroxide or a hydroperoxide group. It is well suited to the routine checking of simple ethers such as diethyl ether (ethyl ether), tetrahydrofuran and dioxan. The polymeric peroxides sometimes occurring in simple ethers are only detected with reduced sensitivity, if at all. This being so, it is advisable to perform a trial determination in the laboratory to verify that the Peroxide Test strip gives satisfactory results. As well as for checking ethers, this product can be used to test UHT milk for residual peroxide, to measure perborates in washing powders, to check electrolytic etching and copper stripping baths, to test peroxides used as bleaches or oxidants in paper manufacture and the textile industry, and to determine peroxides in swimming pool water. Peroxide is an excellent bactericide, fungicide and virucide which does not produce harmful decomposition products. These properties and also the fact that it is a very versatile disinfectant (used sometimes in combination with peracetic acid), make peroxide suitable for use in the food industry. Here, the Peroxide Test can be used not only to monitor disinfectant concentrations but also to test for residues on equipment after cleaning and rinsing. Principle of the Method Peroxidase (POD) transfers oxygen from peroxide to an organic redox indicator, which is converted to a blue oxidation product. When organic solvents are tested, the moisture required for the reaction to occur is provided by breathing on the reaction zone several times or by immersing in distilled water. Graduation 0 - 0.5 - 2 - 5 - 10 - 25mg/l (ppm) H2O2 Directions Aqueous solutions: Remove a test strip and close the container immediately. Immerse the test strip in the sample solution for 1 second, so that the reaction zone is thoroughly moistened. Remove the test strip, gently shake off excess liquid, wait 15 seconds and compare the reaction zone with the color scale. Notes The sample solution should be between pH 2 and 12. Strongly acidic solutions (pH <2) must be buffered with sodium acetate; strongly alkaline solutions (pH >7) with citric acid. The appearance of a blue color within 3 minutes can still be interpreted as a positive reaction. If the zone turns deep blue, green or brown, the peroxide concentration is too high, in which case the sample must be diluted. Use in Dairies In dairies checks must be made on the diethyl ether peroxide concentration of the extraction ether used for fat determinations and on hydrogen peroxide levels in salt baths, peroxide-containing disinfectants and other liquids. Peroxide concentrations must be monitored in the preparation of sterilized (UHT) milk. The packaging material used for flexible containers is disinfected by passing it through a hydrogen peroxide bath. At the point of sale, however, the milk must not contain any peroxide. The Peroxide Test can also be used to distinguish between fresh milk and milk which has turned slightly sour. Sour milk contains pyruvate, which reacts with hydrogen peroxide. The amount of hydrogen peroxide used up in the reaction forms the basis of a simple test: Add a known quantity of H2O2 (1 to 10 drops, 0.3%) to a known volume of milk (e.g. 10ml) and shake well. After a defined reaction time (e.g. 3 minutes) briefly immerse a Peroxide Test strip in the mixture and then remove. Fresh milk produces a blue color on the reaction zone, while sour milk leaves it white because all of the H2O2 is consumed by the pyruvate. Fresh milk typically produces a slight blue coloration following addition of 2 drops of 0.3% H2O2, while 7 drops are required if the milk is sour. We have deliberately left the procedure rather vague and leave it to individual milk testing stations to select the amount of milk taken, the number of drops of reagent to be added and the reaction time. Organic Solvents Volatile Ethers Immerse a test strip for approximately 1 second in the solvent being tested and allow to evaporate. Breathe on the reaction zone 4 times for 3-5 seconds each time. Alternatively, immerse briefly in distilled water. Compare the reaction zone with the color scale. Low Volatility Ethers A. Immiscible with water. Mix a sample of the ether to be tested with 3 times its volume of peroxide-free ether or petroleum benzine (boiling range 40-60°C). Test as described under "Volatile ethers." Record the value indicated on the scale and multiply by 4. B. Miscible with water Mix a sample of the ether to be tested with 3 times its volume of distilled water. Immerse a test strip for approximately 1 second. Wait 2 minutes and compare with the color scale. Convert the results as under "Conversion." Conversion Allowing for dilution, 3mg/l on the color scale is equivalent to: 90mg/l tetrahydrofuran peroxide or 30mg/l peroxide calculated as H2O2 150mg/l dioxan peroxide or 45mg/l peroxide calculated as H2O2. Notes If a dark blue to brown or a green to brown color is produced, the peroxide concentration is too high for the color scale. In this case dilute with water, peroxide-free ether or petroleum benzine (boiling range 40-60°C) as appropriate, and test as directed. Inorganic peroxides are determined in aqueous solution at pH 2-12. Measure the pH with non-bleeding universal indicator strips (pH 0-14) Item #9590-3. If necessary, adjust the pH of the solution with citric acid or 1 mol/l sulfuric acid, or with sodium citrate or sodium acetate as appropriate. For ethylene glycol monoethyl ether containing 4-50mg/l ethylene glycol monoethyl ether peroxide, proceed as follows: Mix a sample of the solvent with an equal volume of fully demineralized water. Briefly immerse a test strip in the aqueous phase, wait 15 seconds and compare the reaction zone with the color scale. Multiply the value obtained by 4 to give the peroxide content in mg H2O2 per liter of ethylene glycol monoethyl ether. Unlike with the conventional methods used to determine ether peroxides. the Peroxide Test strips allow peroxides to be concentrated by repeatedly immersing and breathing on the reaction zone. Immersing a strip once and breathing on it three times enables as little as 5mg/l diethyl ether peroxide to be detected by matching against the lowest value on the scale, and as little as 2mg/l to be estimated. When this procedure is repeated 5 times, as little as 0.5mg/l of diethyl ether peroxide (~2.5 x 10–5% hydrogen peroxide) can still be clearly detected. Not only is this method of detection just as sensitive as the conventional reaction of ether peroxide with potassium iodide in solution (DAB 6 determination), it also gives a reading of the same ether peroxide concentrations in a matter of minutes as opposed to an hour. The conventional potassium iodide/starch paper (which just about enables 20mg/l ether peroxide to be detected) is far less sensitive than the Peroxide Test strips. Use in Organic Solvents It is generally recognized that ether peroxides are dangerous. However, the danger is often underestimated when ethers are being distilled, resulting in explosions which could really be avoided. Explosions can also occur when containers of peroxide-containing liquids are jolted or the peroxides ignite as a result of friction upon opening. This type of risk is inherent not only in ethers such as diethyl ether, diisopropyl ether, dioxan and tetrohydrofuran, but also in other liquids which show a tendency to form peroxides. These include unsaturated hydrocarbons, aldehydes, ketones and tetralin. In order to prevent accidents, these liquids must be tested for peroxides at regular intervals and again prior to their use. The Peroxide Test is extremely useful for performing rapid, reliable, semi-quantitative checks for the presence of hydroperoxides and ether peroxides. It is therefore ideal as a routine test for simple ethers such as diethyl ether, tetrahydrofuran and dioxan. Polymeric peroxides, which occasionally form in diethyl ether, are not detected. The following peroxides either do not react or do so with considerably reduced sensitivity: tert-butyl perbenzoate, dicumyl peroxide, di-tert-butyl peroxide and 1,3-cyclooctadiene. In these cases preliminary testing is recommended, since varying the test conditions sometimes enables a reproducible result to be obtained, or at least a qualitative indication that peroxides are present. Samples should be analyzed simultaneously in the laboratory to verify the suitability of the test strips for the particular test envisaged. What's more, special attention must be given to the expiration date for the test. Control determinations may be needed on ethers of known peroxide content. Polymeric peroxides produce a yellow or orange color with titanium sulfate in 50% sulfuric acid. Notes on the Handling of Diethyl Ether Ether must never be distilled to dryness. When the volume of ether is large, even an initial peroxide content so low as to remain undetected may build up to a dangerous level. It is advisable to test ethers regularly and whenever they are about to be used. Numerous methods of destroying peroxides have been proposed. All of these offer only a partial solution, however. For example, in water-immiscible solvents, hydroperoxides may be removed while polymeric peroxides are not. A method of removing peroxide: Shake before use with a freshly prepared solution of iron (II) sulfate (for each liter of ether, use 5 g iron (II) sulfate dissolved in 20ml water). Repeat until no more peroxide is detected with strip. Air Testing A moistened Peroxide Test strip can be used to measure peroxide levels in air. Briefly dip the test strip in water, shake off surplus liquid and expose to the air for 10 minutes. Then match the color. Matched Color Value Concentration of Gaseous H2O2 1ppm 0.7mg/m3 3ppm 5mg/m3 10ppm 25mg/m3 30ppm 50mg/m3 100ppm 500mg/m3 Influence of Cations and Anions A green to blue coloration of the reaction zone at pH 5-6 is caused by more than 5mg/l Au3+, 5mg/l Ce4+, 250mg/l Hg+, 10mg/l CrO2–4, 10mg/l [Fe(CN)6]3–, 40mg/l O4 , 2mg/l MnO4, 20mg/l S2O2–8 or 5mg/l VO–3 as well as by Br2 and Cl2. Elimination of Interfering Ions The oxidizing anions listed above can be removed with Amberlite® IRA-400 ion exchanger. Fill a glass column (diameter 5-10 mm) with approximately 1 g ion exchanger and allow the test solution, adjusted to pH 5-6 with 1 mol/l hydrochloric acid or 1 mol/l sodium hydroxide solution to run through the column slowly (1 drop/second). Test the eluate for peroxide. At below pH 1.5, Au3+ is separated as AuCl-4 by the ion exchanger. Hg+ is precipitated by adding sodium chloride. Ce4+ is masked by adding a small spatula tip of potassium fluoride to about 5ml of the test solution. Standard (1000mg/l) Add approximately 0.33ml of 30% Perhydrol to approximately 100ml of distilled water and find the exact concentration by titrimetry. Dilute to the required strength. Package Size 10011 EM Quant® Pack of Peroxide Test 100 test strips Purchase Peroxide Test Strips 0.5-25 ppm EM Quant (1 PK of 100) 10011-1 EMD Gallade Part#: 10011 Mfr Part#: 10011-1 Brand: EMD Chemicals EM Science Container: 1 PK of 100 Strips Other products in the category Chemicals for Laboratory / Test Kits/Strips: Alcohol Test Strips 50/each Reflectoquant 1 EA *Requires RQflex 2 EMD# 16950-1 -- Aluminum Test Strips 10-250 ppm EM Quant (1 PK of 100) HAZMAT fee incl -- Aluminum Test Strips 5-50 ppm Reflectoquant 1 PK *Requires RQflex 2 #16950-1 HAZMAT fee incl -- Ammonium Test Strips 0.2-7.0 ppm Reflectoquant 50 PK *Req RQflex 2 #16950-1 HAZMAT fee incl -- Ammonium Test Strips 10-400 ppm EM Quant (1 PK of 100) HAZMAT fee incl -- Ammonium Test Strips 20-180 ppm Reflectoquant 1 PK *Req RQflex 2 EMD# 16950-1 HAZMAT fee incl -- Ammonium Test Strips 5.0-20.0 ppm Reflectoquant 1 PK *Req RQflex 2 #16950-1 HAZMAT fee incl -- Arsenic Test Strips 0.01-0.5 ppm EM Quant (1 PK of 100) HAZMAT fee incl -- Arsenic Test Strips 0.1-3.0 ppm EM Quant (1 PK of 100) HAZMAT fee incl -- Ascorbic Acid Test Strips 25-450 ppm Reflectoquant 50 PK *Requires RQflex 2 EMD# 16950-1 -- Ascorbic Acid Test Strips 50-2000 ppm EM Quant (1 PK of 100) -- Blank Test Strips Reflectoquant 50 PK *Requires RQflex 2 EMD# 16950-1 -- Calcium Test Strips 10-100 ppm EM Quant (1 PK of 60) HAZMAT fee incl -- Calcium Test Strips 2.5-45 ppm Reflectoquant 1 PK *Req RQflex 2 #16950-1 HAZMAT fee incl -- Carbonate Hardness Test Strips 70-425 ppm EM Quant (1 PK of 100) -- Chloride Test Strips 500-3000 ppm EM Quant (1 PK of 100) -- Chlorine Test Strips 0.5-10 ppm Reflectoquant 1 PK *Requires RQflex 2 EMD# 16950-1 -- Chlorine Test Strips 4-120 ppm EM Quant (1 PK of 100) HAZMAT fee incl -- Chromate Test Strips 1.0-45.0 ppm Reflectoquant 1 PK *Req RQflex 2 #16950-1 HAZMAT fee incl -- Chromate Test Strips 3-100 ppm EM Quant (1 PK of 100) HAZMAT fee incl -- Cobalt Test Strips 10-1000 ppm EM Quant (1 PK of 100) -- colorpHastŪ pH Test Strips (non-bleeding), PH Variety Pack, 700181 (13 packs of 100) -- Copper Test Strips 10-300 ppm EM Quant (1 PK of 100) -- Copper Test Strips 5-200 ppm Reflectoquant 1 PK *Requires RQflex 2 EMD# 16950-1 -- Cyanide Test Strips 1-30 ppm EM Quant (1 PK of 100) HAZMAT fee incl -- EM Quant Blank Test Strips (1 PK of 100) -- Fixing Bath (Silver) Test Strips 0.2-5.0 g/l Reflectoquant 1 PK *Requires RQflex 2 EMD# 16950-1 -- Fixing Bath (Silver) Test Strips 0.5-10 g/l EM Quant (1 PK of 100) -- Formaldehyde Test Strips Kit 10-100 ppm EM Quant (1 PK of 100) HAZMAT fee incl -- Glucose Test Strips 1-100 ppm Reflectoquant 50 PK *Requires RQflex 2 EMD# 16950-1 -- Iron Test Strips 0.5-20 ppm Reflectoquant 1 PK *Requires RQflex 2 EMD# 16950-1 -- Iron Test Strips 20-200 ppm Reflectoquant 1 PK *Requires RQflex 2 EMD# 16950-1 -- Iron Test Strips 3-500 ppm EM Quant (1 PK of 100) -- Lactic Acid Test Strips 1-60ppm Reflectoquant 1 PK *Requires RQflex 2 EMD# 16950-1 -- Lead Test Strips 20-500 ppm EM Quant (1 PK of 100) -- Lipase Test Strips 10-400) Reflectoquant 1 EA *Req. 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