<h1>Chromate Test Strips 1.0-45.0 ppm Reflectoquant 1 PK *Req RQflex 10 #16950-1 HAZMAT fee incl -- Gallade Chemical Shopping Cart</h1> <i><a href="http://galladechem.com/freeship.htm" target="_blank"><img src="https://www.nexternal.com/gallade/images/freeship_truck.gif" width="160" height="12" border="0"></a></i> <p> <img src="https://store.nexternal.com/gallade/images/Reflectoquant_Equipment_new11.jpg" align="right" alt="Chromate Test Strips 1.0-45.0 ppm Reflectoquant 1 PK *Req RQflex 10 #16950-1 HAZMAT fee incl" name="Chromate Test Strips 1.0-45.0 ppm Reflectoquant 1 PK *Req RQflex 10 #16950-1 HAZMAT fee incl" border="0" hspace="10" /> <a href="http://www.emdchemicals.com/analytics/doc/msds/MSDSU_16988.htm" target="_blank">MSDS (Material Safety Data Sheet)</a> <br /><br /><br /><br /><br /><br /><br /><br /><link href="/analytics/lit.css" type="text/css" rel="stylesheet"></link><table cellspacing="0" cellpadding="8" width="90%" align="center" border="0"> <tbody> <tr> <td><h2>Reflectoquant<sup>&#174;</sup> Chromate Test, Catalog No. 16988/1</h2> <h4>1. Method</h4> <p>In acidic solutions, chromate is reduced to Cr(III) by reacting with diphenylcarbazide. The resultant diphenylcarbazone reacts with Cr(III) to form a red-violet complex, the concentration of which is determined reflectometrically.</p> <h4>2. Measuring Range and Number of Determinations</h4> <table cellpadding="5" width="400" align="center" border="1"> <tbody> <tr> <td align="center"><b>Measuring Range<sup>1)</sup></b></td> <td align="center"><b>Number of Determinations</b></td> </tr> <tr> <td align="center">1.0 - 45.0mg/l CrO<sub>4</sub><sup>2&#8211;</sup><br /><br />0.45 - 20.2mg/l Cr</td> <td align="center">50</td> </tr> </tbody> </table><p><sup>1)</sup> for conversion factors see section 8<br /><br />for measurement of concentrations &gt; 45.0mg/l CrO<sub>4</sub><sup>2&#8211;</sup>see section 6</p> <h4>3. Applications</h4> <h4>Sample Material:</h4> <p>Wastewater, especially from electroplating factories, and from the pickling and tanning industries.</p> <h4>4. Influence of Foreign Substances</h4> <p>This was checked - in the case of interfering ions up to concentrations of 1,000mg/l - in solutions containing 25mg and 0mg/l CrO<sub>4</sub><sup>2&#8211;</sup>. The concentrations of foreign substances given in the table lie below the limit at which the determination is interfered with:<br /><br /><b>Concentrations of Foreign Substances in mg/l or %</b></p> <table cellpadding="5" width="500" align="center" border="1"> <tbody> <tr> <td valign="top" align="center"><table cellpadding="3" width="100%" align="center" border="0"> <tbody> <tr> <td align="center">Ag<sup>+</sup></td> <td align="right">1,000</td> </tr> <tr> <td align="center">Al<sup>3+</sup></td> <td align="right">1,000</td> </tr> <tr> <td align="center">Ascorbate</td> <td align="right">1</td> </tr> <tr> <td align="center">BO<sub>3</sub><sup>3-</sup></td> <td align="right">1,000</td> </tr> <tr> <td align="center">Ca<sup>2+</sup></td> <td align="right">1,000</td> </tr> <tr> <td align="center">Cd<sup>2+</sup></td> <td align="right">1,000</td> </tr> <tr> <td align="center">Citrate</td> <td align="right">1,000</td> </tr> <tr> <td align="center">CN<sup>-</sup></td> <td align="right">100</td> </tr> <tr> <td align="center">CO<sub>3</sub><sup>2-</sup></td> <td align="right">1,000</td> </tr> <tr> <td align="center">Fe<sup>2+</sup></td> <td align="right">1</td> </tr> <tr> <td align="center">Fe<sup>3+</sup></td> <td align="right">100</td> </tr> <tr> <td align="center">K<sup>+</sup></td> <td align="right">1,000</td> </tr> </tbody> </table></td> <td valign="top" align="center"><table cellpadding="3" width="100%" align="center" border="0"> <tbody> <tr> <td align="center">Mg<sup>2+</sup></td> <td align="right">1,000</td> </tr> <tr> <td align="center">Mn<sup>2+</sup></td> <td align="right">1,000</td> </tr> <tr> <td align="center">Ni<sup>2+</sup></td> <td align="right">1,000</td> </tr> <tr> <td align="center">NO<sub>2</sub><sup>-</sup></td> <td align="right">100</td> </tr> <tr> <td align="center">NO<sub>3</sub><sup>+</sup></td> <td align="right">1,000</td> </tr> <tr> <td align="center">Oxalate</td> <td align="right">1,000</td> </tr> <tr> <td align="center">Pb<sup>2+</sup></td> <td align="right">1,000</td> </tr> <tr> <td align="center">PO<sub>4</sub><sup>3-</sup></td> <td align="right">1,000</td> </tr> <tr> <td align="center">S<sub>2</sub>O<sub>3</sub><sup>2-</sup></td> <td align="right">1</td> </tr> <tr> <td align="center">Tartrate</td> <td align="right">1,000</td> </tr> <tr> <td align="center">Zn<sup>2+</sup></td> <td align="right">1,000</td> </tr> <tr> <td>&nbsp;</td> <td>&nbsp;</td> </tr> </tbody> </table></td> <td valign="top" align="center"><table cellpadding="3" width="100%" align="center" border="0"> <tbody> <tr> <td align="center">EDTA</td> <td align="right">100</td> </tr> <tr> <td align="center">Anionic Surfactants<sup>1)</sup></td> <td align="right">1,000</td> </tr> <tr> <td>Cationic Surfactants<sup>2)</sup></td> <td align="right">1,000</td> </tr> <tr> <td align="center">Nonionic Surfactants<sup>3)</sup></td> <td align="right">1,000</td> </tr> <tr> <td align="center">H<sub>2</sub>O<sub>2</sub></td> <td align="right">1</td> </tr> <tr> <td align="center">NaCl</td> <td align="right">1%</td> </tr> <tr> <td align="center">Na<sub>2</sub>SO<sub>4</sub></td> <td align="right">1%</td> </tr> </tbody> </table></td> </tr> </tbody> </table><p><sup>1)</sup> tested with Na-dodecyl sulfate<br /><br /><sup>2) </sup>tested with N-cetylpyridinium chloride<br /><br /><sup>3)</sup> tested with polyvinylpyrrolidone</p> <h4>5. Reagents and Auxiliaries</h4> <p><font color="#ff0000" size="3"><b>Please Note the Warnings on Labels!</b></font><br />The analytic test strips are stable at least up to the date stated on the pack when stored in the closed tube at +15 to +25&#176;&#183;C.</p> <h4>Package Contents:</h4> <p>Tube containing 50 analytical test strips<br />Bar code strip<br />1 bottle of reagent CrO<sub>4</sub>&#8211;1</p> <h4>Other Reagents:</h4> <p>EM Quant<sup>&#174;</sup> Chromate Test, Cat. No. 10012, measuring range 3-100mg/l CrO<sub>4</sub><sup>2&#8211;</sup><br />Chromate standard solution ready for use, 1,000mg/l Cat No. 1.19780, Merck, KGaA, Darmstadt, Germany</p> <h4>6. Preparation</h4> <ul> <li>Check whether the chromate content is within the measuring range </li> <li>Use the EM Quant<sup>&#174;</sup> Chromate Test as a guide. Samples containing more than 45.0 mg/l CrO<sub>4</sub><sup>2&#8211;</sup> must be diluted with distilled water. </li> </ul> <h4>7. Procedure</h4> <ul> <li>Observe the instructions for the RQflex Reflectometer.</li> </ul> <p>The following applies to the Chromate Test:<br /><br /><b>Measurement procedure A</b>. Stored reaction time: 30 sec.</p> <ul> <li>Rinse the test vessel several times with the solution to be tested (15-30&#176;C). Then fill to the 10-ml mark. </li> <li>Add 10 drops of reagent CrO<sub>4</sub>&#8211;1 and swirl. </li> <li>Remove 1 analytical test strip and <b>immediately</b> <b>reclose the tube.</b> </li> <li>Press START button of the reflectometer and at the same time immerse <b>both reaction zones</b> of the test strip in the measurement solution <b>for approx. 2 sec.</b> </li> <li>Shake off excess liquid from the test strip </li> <li>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. </li> <li>Read off the result from the display. The result is automatically stored. </li> </ul> <h4>Notes:</h4> <ul> <li>If the test strip is inserted into the adapter after the reaction time has expired, renewed depression of the START button may result in a false reading of the chromate concentration. </li> <li>At the end of each workday, cleanse the strip adapter thoroughly with water or ethanol. </li> </ul> <h4>8. Conversions</h4> <table cellpadding="5" width="400" align="center" border="1"> <tbody> <tr> <td align="center"><b>Units Required =</b></td> <td align="center"><b>Units Given x</b></td> <td align="center"><b>Conversion Factor</b></td> </tr> <tr> <td align="center">mg/l Cr</td> <td align="center">mg/l CrO<sub>4</sub><sup>2&#8211;</sup></td> <td align="center">0.448</td> </tr> <tr> <td align="center">mg/l CrO<sub>4</sub><sup>2&#8211;</sup></td> <td align="center">mg/l Cr</td> <td align="center">2.23</td> </tr> </tbody> </table><h4>9. Method Control</h4> <p>To check analytical test strips, equipment and procedure:<br /><br />Dilute chromate standard solution to 10 mg/l CrO<sub>4</sub><sup>2&#8211;</sup> and analyze as described in section 7.</p> </td> </tr> </tbody> </table></p> <p> <ul style="padding-left: 15px"> <li>Gallade Part#: 169881</li> <li>Mfr Part#: 16988-1</li> <li>Brand: EMD Chemicals EM Science</li> <li>Container: 1 PK of 50 Strips</li> <li>Misc: HAZMAT UN2796 PGII CORROSIVE</li> </ul> </p> <p><b>Other products in the category <a href="http://store.galladechem.com/Category5" title="Chemicals for Laboratory">Chemicals for Laboratory</a> / <a href="http://store.galladechem.com/Category81" title="Test Kits/Strips">Test Kits/Strips</a>:</b> <br clear="left"><br /><a href="http://store.galladechem.com/Product16344" title="Alcohol Test Strips 50/each Reflectoquant 1 EA *Requires RQflex 10 EMD# 16950-1"><img src="https://store.nexternal.com/gallade/images/Reflectoquant_Equipment_new.jpg" width="68" 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