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    uric acid assay

    Read Articles related to uric acid assay. A range of uric acid assay information are available on echemi.com.
    • The largest sulphur-burning sulphuric acid project in Asia was put into operation

      Time of Update: 2021-11-25
      Recently, the 3 million tons/year low-grade collophane ore beneficiation and deep processing project sulfuric acid plant contracted by China Chemical Fourth Company was officially put into operation.
    • Adipic acid production capacity continues to expand, export volume may increase

      Time of Update: 2021-11-25
      3. Comparison of export volume of major manufacturers   Chongqing Huafeng is the largest adipic acid production plant in China, and its export volume has also ranked first in recent years.
    • Glacial acetic acid for industrial use (Appendix A, Appendix B, Appendix C)

      Time of Update: 2021-11-24
      1 Comparison table of relationship between crystallization point and content of glacial acetic acid Appendix C(Normative appendix)Determination of relative mass correction factorC.
    • Trichloroisocyanuric acid (1)

      Time of Update: 2021-11-24
      3. 2 Trichloroisocyanuric acid should meet the technical requirements in Table 1 .
    • Glacial acetic acid for industrial use (3)

      Time of Update: 2021-11-24
      , and the remaining potassium bromide-potassium bromate is measured by iodometry . >The content of formic acid is obtained from the difference between the measured values ​​of the two steps
    • Trichloroisocyanuric acid (three)

      Time of Update: 2021-11-24
      national regulations and requirements . >6. 3 Dichloroisocyanuric acid should be covered during transportation to prevent it from being exposed to the sun, rain, and moisture
    • Trichloroisocyanuric acid (two)

      Time of Update: 2021-11-24
      1. 1 Method summaryThe sample reacts with potassium iodide in an acidic medium to precipitate iodine, which is titrated with sodium thiosulfate standard titration solution using starch as an indicator to calculate the available chlorine content .
    • Oxalic acid for industrial use (1)

      Time of Update: 2021-11-24
      1 ScopeThis standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of oxalic acid for industrial use .
    • Glacial acetic acid for industrial use (6)

      Time of Update: 2021-11-24
      Hydrochloric acid solution: 1+1, take premium grade pure hydrochloric acid for preparation;>4. 10. 2. 2
    • Glacial acetic acid for industrial use (7)

      Time of Update: 2021-11-24
      1 Method summaryUnder specified conditions, add potassium permanganate solution to the sample to be tested, compare it with the standard colorimetric solution, and observe the time required for the test solution to fade .
    • Oxalic acid for industrial use (4)

      Time of Update: 2021-11-23
      7. 3 The number of oxalic acid sampling units for industrial use shall be determined in accordance with 7.
    • Industrial Sebacic Acid (2)

      Time of Update: 2021-11-23
      4) after the sample is completely dissolved, add 2 drops of phenolphthalein indicator, use sodium hydroxide standard The titration solution (4.
    • Oxalic acid for industrial use (3)

      Time of Update: 2021-11-23
      After cooling, add hydrochloric acid to acidify, prepare a solution of appropriate concentration with water, and measure the absorbance of the sample at the specific wavelength of iron with a flame atomic absorption spectrometer.
    • Formic acid for industrial use (3)

      Time of Update: 2021-11-23
      5. 7 Determination of chloride content>5. 7. 1 Method summary>In an acidic solution
    • Formic acid for industrial use (2)

      Time of Update: 2021-11-23
      Calculate the mass fraction of formic acid according to the volume of the standard titration solution that the sample consumes sodium hydroxide .
    • Formic acid for industrial use (1)

      Time of Update: 2021-11-23
      1 ScopeThis standard specifies the product classification, requirements, test methods, inspection rules and signs, packaging, transportation, storage and safety of industrial formic acid .
    • Formic acid for industrial use (4)

      Time of Update: 2021-11-23
      > (SO 4 ) standard solution: 0. 1 mg/mL . >5. 8. 2. 2 Hydrochloric acid
    • Oxalic acid for industrial use (2)

      Time of Update: 2021-11-23
      5 mL of sodium carbonate solution, evaporate to dryness on a water bath, then heat on an electric furnace to decompose oxalic acid, and then burn in a high-temperature furnace at 850°C for 5 min.
    • Glacial acetic acid for industrial use (5)

      Time of Update: 2021-11-23
      4 Result calculationThe mass fraction of acetaldehyde w 4 , the value is expressed in %, calculated according to formula (4): Where:V 0 —The value of the volume of the sodium thiosulfate standard titration solution (4.
    • Formic acid for industrial use (5)

      Time of Update: 2021-11-23
      Even if only one index does not meet the requirements of this standard as a result of the re-inspection, the whole batch of products is unqualified .

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