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What are the methods for measuring ammonia content of natural latex?
Shenzhen latex tube products are generally made of natural latex, andpreservation methods of natural latex are that the use of ammonia. Ammoniacontent of natural latex with different qualities of different measuring methods ofpipe, then the natural latex ammonia content of what?
Natural rubber latex usually in determination of alkalinity, because different types of natural latex alkalinity and pH value of the difference is very obvious, so theStandard Specification for latex natural stipulated in alkalinity without pH.Alkalinity is the meaning of latex free alkali content, with quality percentage.
Such as the use of ammonia [or KOH] preservation of natural rubber latex,certain alkalinity usually said [or KOH said] the determination method forammonia content: from ammonia for natural rubber latex concentratepreservation agent, the existence of non ion type stabilizer solution in the epoxy ethane condensation type, with sulfuric acid or hydrochloric acid standard titration solution, will be diluted latex titration to pH 6 Determination of alkalinity. Ifno potential titration method, also can use 1% methyl red solution as a visualindicator, when the color into pink, as an end.
To determination of latex pH, available oneself with borax solution and two formic acid solution of potassium hydrogen phthalate calibrated pH meter,accompanied by a glass electrode and saturated calomel cell was determined.
This article from the Shenzhen City Qiyu Silicone Rubber Co., Ltd.: http://m.baozhi.net.cn/news_v.asp? Id=181
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