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Product code: MX-12340
Test tube cooling rack Order Information: 25 tube capacity
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The HI740216 Test Tube Cooling Rack is able to hold up to 25 test tubes measuring 16 mm in diameter. When paired with the HI839800 COD Test Tube Heater, customers are provided with an effective solution to their testing needs. After performing the heated digestion reaction for COD, total nitrogen, and total phosphorus analysis, the test tube heater is turned off and the blank and reagent vials are allowed to cool for approximately 20 minutes. The test tube vials can are carefully removed from the test tube heater and placed in the cooling rack. Reagent vials should be near room temperature prior to determination with a COD photometer.

Hanna
MX-11176
HI9829-14/15 is for premium quality 10 ppm and 100 ppm (mg/L) Nitrate (as N) calibration standards. It is produced in accordance with ISO 3696/BS3978 standards using high purity salts, deionized water, certified weight-checked balances, and Class A glassware in a temperature controlled environment monitored with…