Method for detecting content of chloride ions in paper pulp

Method for detecting content of chloride ions in paper pulp

  • CN 106,290,632 B
  • Filed: 08/06/2016
  • Issued: 10/23/2020
  • Est. Priority Date: 08/06/2016
  • Status: Active Grant
First Claim
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1. A method for detecting the content of chloride ions in paper pulp is characterized by comprising the following steps:

  • (1) extracting chloride ions in a paper pulp sample to be detected to obtain an extracting solution;

    (2) filtering the extractive solution, and quantitatively measuring by ion chromatography;

    the step (1) of extracting chloride ions in the pulp sample to be detected comprises the following steps;

    adding a sodium hydroxide solution and deionized water into a paper pulp sample to be detected, sealing, and carrying out ultrasonic extraction;

    heating the sample solution obtained after ultrasonic extraction, and then cooling to obtain an extracting solution;

    the pulp sample to be tested is measured according to g/ml;

    the total volume of the sodium hydroxide solution and the deionized water is 2;

    50;

    the volume ratio of the sodium hydroxide solution to the deionized water is 5;

    45, a first step of;

    the concentration of the sodium hydroxide solution is 30 mol/L;

    the ultrasonic extraction time is 120min, and the power is 100W;

    the heating power is 1200W, and the heating time is 20 min;

    the ion chromatography conditions of step (2) comprise;

    the ion chromatograph is a WY-IC6200 type ion chromatograph;

    the chromatographic column is Shodex SI52-4E anion chromatographic column;

    the leacheate is 3.6mmol/L sodium carbonate leacheate;

    flow rate;

    0.8 mL/min;

    temperature of the conductivity detector;

    40 ℃

    ;

    column temperature;

    50 ℃

    ;

    suppression of current;

    30 mA;

    sample introduction amount;

    25 μ

    L.

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