中国地方病学杂志
中國地方病學雜誌
중국지방병학잡지
CHINESE JOURNAL OF ENDEMIOLOGY
2008年
3期
311-313
,共3页
碘%盐类%次氯酸钠%参考标准
碘%鹽類%次氯痠鈉%參攷標準
전%염류%차록산납%삼고표준
Iodine%Salts%Sodium hypochlorite%Reference standards
目的 探讨国家标准<制盐工业通用试验方法碘离子的测定>中仲裁法的次氯酸钠用量与草酸用量不匹配的问题,提出解决方法.方法 在不变草酸用量的前提下,按<制盐工业通用试验方法碘离子的测定>规定的实验步骤,选用2.5%、1.0%、0.3%、0.2%、0.1%的次氯酸钠溶液测定标准质量浓度的碘化钾碘盐,确定适宜的次氯酸钠的用量范围.结果 使用国家标准规定的5.0%次氯酸钠溶液,可使测定结果绝对偏高达700 ms/kg左右.以5.0%、3.0%、2.5%、1.0%、0.3%、0.2%、0.1%次氯酸钠测定标准碘化钾盐样的相对误差分别为2312.0%、185.0%、4.0%、3.3%、-0.6%、-3.0%、-3.3%.结论 草酸用量不变,国家标准<制盐工业通用试验方法碘离子的测定>仲裁法中次氯酸钠溶液的用量范围应更改为0.3%～2.5%.
目的 探討國傢標準<製鹽工業通用試驗方法碘離子的測定>中仲裁法的次氯痠鈉用量與草痠用量不匹配的問題,提齣解決方法.方法 在不變草痠用量的前提下,按<製鹽工業通用試驗方法碘離子的測定>規定的實驗步驟,選用2.5%、1.0%、0.3%、0.2%、0.1%的次氯痠鈉溶液測定標準質量濃度的碘化鉀碘鹽,確定適宜的次氯痠鈉的用量範圍.結果 使用國傢標準規定的5.0%次氯痠鈉溶液,可使測定結果絕對偏高達700 ms/kg左右.以5.0%、3.0%、2.5%、1.0%、0.3%、0.2%、0.1%次氯痠鈉測定標準碘化鉀鹽樣的相對誤差分彆為2312.0%、185.0%、4.0%、3.3%、-0.6%、-3.0%、-3.3%.結論 草痠用量不變,國傢標準<製鹽工業通用試驗方法碘離子的測定>仲裁法中次氯痠鈉溶液的用量範圍應更改為0.3%～2.5%.
목적 탐토국가표준<제염공업통용시험방법전리자적측정>중중재법적차록산납용량여초산용량불필배적문제,제출해결방법.방법 재불변초산용량적전제하,안<제염공업통용시험방법전리자적측정>규정적실험보취,선용2.5%、1.0%、0.3%、0.2%、0.1%적차록산납용액측정표준질량농도적전화갑전염,학정괄의적차록산납적용량범위.결과 사용국가표준규정적5.0%차록산납용액,가사측정결과절대편고체700 ms/kg좌우.이5.0%、3.0%、2.5%、1.0%、0.3%、0.2%、0.1%차록산납측정표준전화갑염양적상대오차분별위2312.0%、185.0%、4.0%、3.3%、-0.6%、-3.0%、-3.3%.결론 초산용량불변,국가표준<제염공업통용시험방법전리자적측정>중재법중차록산납용액적용량범위응경개위0.3%～2.5%.
Objective To discuss the national standard method of"General Test Method in Salt IndustryDetermination of Iodine Ion"and point OUt an incorrect concentration of sodium hypochlorite(NaClO)solution which is not matched with the concentration of oxalic acid solution being used in the national standard method.Methods The iodine ion in the reference salt was determined step by step as stipulated in the method.During the test,the concentration of the NaClO solution was altered from 5.0%to 0.1%in order to screen the suitable ranges of the concentration of NaClO solution.Results 5.0%NaClO solution was used according to the national standard method,which led to a significant deviation up to 700 ms/kg.The relative errors of the standard iodized salt determination were respectively 2312.0%,185.0%,4.0%,3.3%,-0.6%,-3.0%,-3.3%with different concentration NaClO(5.0%,3.0%,2.5%,1.0%,0.3%,0.2%,0.1%).Conclusion Under the circumstance that the concentration of the oxalic acid solution remains the same.the concentration of NaClO solution must be revised into 0.3%～2.5%in the national standard method to decrease testing errors.
