CAJ | 학술논문

探讨了COD为60mg/L的情况下，氯离子对测定值的影响。氯离子浓度在100mg/L时，固态硫酸汞可完全屏蔽其干扰；氯离子浓度在500 mg /L时，液态硫酸汞可完全屏蔽其干扰；绘制COD-氯离子标准曲线，屏蔽氯离子浓度可达2000mg/L，但操作较为繁琐；在水样环境单纯的情况下，用低浓度重铬酸钾法，可忽略氯离子的干扰。
탐토료COD위60mg/L적정황하，록리자대측정치적영향。록리자농도재100mg/L시，고태류산홍가완전병폐기간우；록리자농도재500 mg /L시，액태류산홍가완전병폐기간우；회제COD-록리자표준곡선，병폐록리자농도가체2000mg/L，단조작교위번쇄；재수양배경단순적정황하，용저농도중락산갑법，가홀략록리자적간우。
This paper,presented the influence of chloride ion on COD when it was 60mg/L.When chloride ion concentration was about 100mg/L,solid mercury sulfate could be used to screen the interference of chloride ion.It is the same case when chloride ion concentration was about 500mg/L.By drawing the standard curve with COD as the y-coordinate and chloride ion concentration as the x-coordinate,we could see that the maximum chloride ion concentration was about 2000mg/L without interference.But the operation was complicated.The influence of chlo-ride ion might be negligible in water with low COD measuring by 0.025 mol/L potassium dichromate.