Using automatic potentiometric titration, in the presence of total ionic strength buffer solution, in a slightly acidic aqueous solution of pH5, using 0.05mol·L-1 silver nitrate standard solution as the titrant, the chloride content in the desulfurization system sample was determined. The sample is leached with water to dissolve the chloride, and the interference of coexisting sulfite is eliminated by adding hydrogen peroxide under near-neutral conditions until no small bubbles are generated. The sample pretreatment method and various parameters that affect the measurement, etc. Experimented and optimized. The method was used to determine chloride in desulfurization wastewater, desulfurization slurry and desulfurization gypsum samples. The recovery rate was 95.7% -102.0%, and the relative standard deviation (n = 5) was 1.2% -5.9%.
We cover a full range of baby items, such as baby rattle, baby teether, baby musical ,baby squeaker,baby hammock, baby comfort towel,blanket, baby gym and so on. We have a very strong OEM&ODM designing team. Annually, we will design more than 200 new items for our customer to select. Customized design is welcomed.
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Our toys are followed strictly international standards such as EN71 &ASTM963. We have passed BSCI, Sedex certificate.
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Ningbo Dikai Imp&Exp Co., Ltd , https://www.longkaitoys.com