a Test 'N Tube NitriVer 3 Nitrite vial with 5 mL of sample. 3. Put the cap on the vial. Shake to dissolve the powder. A pink color shows if nitrite-nitrogen is present in the sample . 4. Start the instrument timer. A 20‑minute reaction time starts. 5. Prepare the blank: When the timer expires, fill and empty Test 'N Tube vial with 5 mL of sample. 6. Clean the blank vial. 7.
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Analytical conditions: Samples were analyzed as described in the laboratories’ HPAEC-PAD test protocols. A Dionex DX-500 chromatography system equipped with a CarboPac MA1 analytical column was used in combination with a CarboPac MA1 guard column. PRP was hydrolyzed with 0.3 M HCl for 2 hours at 100°C.
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Apr 15, 2020 · After processing, samples were immediately frozen in cryogenic vials for further investigations with other tests. Statistical Analysis A generalized linear mixed model was fitted to estimate the analytical sensitivity of the ELISA test on different dilutions using the GLIMMIX procedure in SAS 9.4 (SAS Institute Inc., Cary, NC).
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