CAJ | 학술논문

经典的铬法分析化学需氧量（COD）时间较长，对外排（排入污水处理厂）或适时监测的样品，有一定局限性。快速消解比色法分析速度较快，对COD较高的样品分析结果准确可靠，但对COD含量小于100 mg/L的样品，快速消解比色法结果同经典的GB 11914-89铬回流法存在显著差异。通过对快速消解比色法进行改进，降低重铬酸钾标准溶液浓度，获得稳定、准确、可靠的测量结果。
경전적락법분석화학수양량（COD）시간교장，대외배（배입오수처리엄）혹괄시감측적양품，유일정국한성。쾌속소해비색법분석속도교쾌，대COD교고적양품분석결과준학가고，단대COD함량소우100 mg/L적양품，쾌속소해비색법결과동경전적GB 11914-89락회류법존재현저차이。통과대쾌속소해비색법진행개진，강저중락산갑표준용액농도，획득은정、준학、가고적측량결과。
The potassium dichromate method (GB 11914-89) as a typical method to determine COD value has limitation for real-time monitoring waste samples, due to its longer test time. Fast digestion-colori-metric method is more accurate and rapid when employed to determine high COD samples, while its results appear in a significant difference with the classic potassium dichromate method when applied to below 100 mg/L COD samples. Therefore, the fast digestion-colorimetric method was modified, through reducing the concentration of potassium dichromate solution, and the stable, accurate and reliable results were obtained for testing low COD samples.