广州化工
廣州化工
엄주화공
GUANGZHOU CHEMICAL INDUSTRY AND TECHNOLOGY
2015年
11期
127-128,155
,共3页
草酸钠%标定%高锰酸钾%条件%改进
草痠鈉%標定%高錳痠鉀%條件%改進
초산납%표정%고맹산갑%조건%개진
sodium oxalate%calibration%potassium permanganate%conditions%improvement
探讨了用草酸钠作为基准物质标定高锰酸钾标准溶液过程中的实验条件，在国标法的基础上分析了加热时机、温度、酸度对标定结果的影响，建议国标法的标定方法改进为：采用100 mL(4+96)硫酸介质、先加热到70~80℃再用高锰酸钾标准溶液滴定的操作方法，可以节省硫酸用量、节省标定时间，同时保证滴定的准确度。
探討瞭用草痠鈉作為基準物質標定高錳痠鉀標準溶液過程中的實驗條件，在國標法的基礎上分析瞭加熱時機、溫度、痠度對標定結果的影響，建議國標法的標定方法改進為：採用100 mL(4+96)硫痠介質、先加熱到70~80℃再用高錳痠鉀標準溶液滴定的操作方法，可以節省硫痠用量、節省標定時間，同時保證滴定的準確度。
탐토료용초산납작위기준물질표정고맹산갑표준용액과정중적실험조건，재국표법적기출상분석료가열시궤、온도、산도대표정결과적영향，건의국표법적표정방법개진위：채용100 mL(4+96)류산개질、선가열도70~80℃재용고맹산갑표준용액적정적조작방법，가이절성류산용량、절성표정시간，동시보증적정적준학도。
The experiment conditions of potassium permanganate titrant were discussed which sodium oxalate was regarded as the basis material. The influences of the heating time, temperature and acidity on the calibration results on the basis of the national standard method were analyzed. The results recommended that the calibration conditions of national standard method should be improved by using 100 mL (4+96) sulfuric acid medium, and titrating after the potassium permanganate standard solution be heated to 70 ~ 80 ℃. The improvements could save the sulfuric acid consumption and the time of calibration, with guaranteeing the accuracy of titration.
