广东化工
廣東化工
엄동화공
GUANGDONG CHEMICAL INDUSTRY
2012年
17期
146-146,148
,共2页
溴化锂%铬酸盐%分光光度法%二苯碳酰二肼
溴化鋰%鉻痠鹽%分光光度法%二苯碳酰二肼
추화리%락산염%분광광도법%이분탄선이정
lithium bromide%chromate%spectrophotometry%diphenylcarbazide
文章利用二苯碳酰二肼试剂在酸性条件下与六价铬反应,生成二苯碳酰二肼铬,化合物呈紫红色.在波长540nm处有最大吸收峰。对制冷机中溴化锂溶液中的总铬进行测定,对总铬测定则采用先氧化,使铬全部转化为六价,然后再与二苯碳酰二肼反应。实验测定铬范围为O.020-0.20mg/L,精密度±5%。样品回收率98%~102%,对样品稍加处理便能测定,方法简便。
文章利用二苯碳酰二肼試劑在痠性條件下與六價鉻反應,生成二苯碳酰二肼鉻,化閤物呈紫紅色.在波長540nm處有最大吸收峰。對製冷機中溴化鋰溶液中的總鉻進行測定,對總鉻測定則採用先氧化,使鉻全部轉化為六價,然後再與二苯碳酰二肼反應。實驗測定鉻範圍為O.020-0.20mg/L,精密度±5%。樣品迴收率98%~102%,對樣品稍加處理便能測定,方法簡便。
문장이용이분탄선이정시제재산성조건하여륙개락반응,생성이분탄선이정락,화합물정자홍색.재파장540nm처유최대흡수봉。대제랭궤중추화리용액중적총락진행측정,대총락측정칙채용선양화,사락전부전화위륙개,연후재여이분탄선이정반응。실험측정락범위위O.020-0.20mg/L,정밀도±5%。양품회수솔98%~102%,대양품초가처리편능측정,방법간편。
In the paper, spectrophotometric determination of chromate in lithium bromide refrigerant has beenstudied. With diphenylcarbazide as color reagent, and under appropriate test conditions, the content of chromate in lithium bromide refrigerant has been determined with satisfactory result. Recovery rate as highas 98 %-102 % has been obtained with identifying tags. So the method of determination is simple,speedy, accurate and reliable.