Method for measuring total quantity of hydracids gas released from combustion of cable
A certain amount of halogen acid technology, applied in the direction of chemical analysis by titration method, can solve the problems of inaccurate determination of the end point, inaccurate measurement, and difficult to observe the discoloration of the indicator. The titration end point is obvious, the accuracy is improved, Easy to observe effect
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[0034] The present invention will be further described below by embodiment; Embodiment.
[0035] 1. Using samples and reagents
[0036] ①1g electric (wire) cable
[0037] ②Distilled water
[0038] ③0.1M sodium hydroxide (NaOH) solution (M is the molar concentration);
[0039] ④0.1M silver nitrate (AgNO 3 ) solution;
[0040] ⑤5% potassium chromate (K 2 CrO 4 ) solution (5g of potassium chromate dissolved in 95mL of distilled water);
[0041] ⑥PH test paper.
[0042] 2. Determination steps
[0043] 1. Clean all kinds of experimental equipment with distilled water.
[0044] 2. Place an accurately weighed 1g electric (wire) cable sample in the combustion tube of the tube furnace, and then introduce the halogen acid gas released by combustion into a washing bottle filled with 200mL of 0.1M sodium hydroxide (NaOH) solution Fully absorbed in the medium, and measured with PH test paper, the pH of the sodium hydroxide solution is required to be 7-8.
[0045] 200mL of 0.1M s...
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