一、COD消解器产品概述
QYC0D系列COD消解器执行HJ828-2017水质化学需氧量的测定，重铬酸盐法，分析方法规范地制定了水质化学需氧量COD（cr）的测定步骤，严格地规定了方法的加热消解时间、溶液酸度、氧化剂和催化剂的用量等条件指标。显而易见，水质COD（cr）的测定是有严格的条件规定，违背了条件规定进行操作，就会影响测定的准确性。遵循了国际标准（ISO）和国家标准（HJ）的基本原则，保证了回流加热微沸2小时的消解操作，试剂溶液的配制和加入量都和HJ法一致，确保可靠**的分析结果。
二、产品特点
QYC0D系列COD消解器采用微机技术进行定时控制加热电炉，可对12个24#标准磨口的消解回流装置同时进行加热。达到节能、减低电力负荷、提高效率的目的。
采用玻璃毛刺回流管代替球形回流管，并以风冷技术取代自来水冷却方式，既可以节水又能使仪器规范化，同时还提高了仪器使用的**性。仪器的化学溶液配制、
操作和COD的计算完全遵照HJ828-2017，低于50mg/L的COD水样可通过稀释滴定剂和氧化剂来提高**度，高于700mg/L的COD水样，可以通过水样的比例稀释来完成测定。
三、技术特点
1、升降温速度快。
2、消解瓶消解完毕后可直接滴定测量，方便摇匀。
3、加热均匀、使用寿命长。
4、可以设定消解时间，消解完毕后，仪器自动停止加热，可无人看管。
5、样品消解完毕后，仪器风机继续工作，辅助样品冷却。
6、以风冷取代水冷,节约用电、用水，提高了效率，增强了仪器的**性。
四、技术参数
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型号
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QYC0D-4
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QYC0D-8
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QYCOD-12
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测量范围
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10～1000mg/L（大于1000mg/L的水样稀释后测定）
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稀释后测定消解时间
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10分钟－2小时（用户可通过按键自行调整消解时间）
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测量误差
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邻苯二甲酸氢钾标准溶液（500mg/L）、
相对标准偏差不大于5.0%、工业有机废水（500mg/L）
相对标准偏、差不大于8.0%
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消解样品数
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12个（采用24#磨口的150mL消解瓶）
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加热功率
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1000W
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1500W
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2000W
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冷却方式
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风冷
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加热材质
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陶瓷
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陶瓷
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陶瓷
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备注
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其他加热材质和消解数量可根据客户要求定制
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I. product overview
QYC0D series COD disintegrators perform the determination of chemical oxygen demand (COD) in water quality from hj828-2017. Dichromate
method is used to formulate the determination steps of COD (cr) in water quality in a standardized way. The condition indexes of the method,
such as the heating and digestion time, the acidity of the solution, the amount of oxidant and catalyst, etc., are strictly specified. Obviously,
the determination of COD (cr) in water is subject to strict requirements. If the operation violates the requirements, the accuracy of the
determination will be affected. In accordance with the basic principles of international standard (ISO) and national standard (HJ),
the digestion operation of reflux heating micro boiling for 2 hours is guaranteed. The preparation and addition amount of reagent
solution are consistent with the HJ method, ensuring reliable and accurate analysis results.
Ii. Product features
QYC0D series COD disintegrator adopts microcomputer technology to control the heating electric furnace on time, which can be
used to heat 12 24# standard grinding mouth dissolving reflux devices at the same time. To save energy, reduce power load and
improve efficiency. Adopting glass burr reflux pipe instead of spherical reflux pipe and replacing tap water cooling with air cooling
technology can both save water and standardize the instrument, and at the same time improve the safety of the instrument.
The chemical solution preparation, operation and COD calculation of the instrument completely comply with hj828-2017.
COD water samples less than 50mg/L can be improved by diluting titrant and oxidant, while COD water samples
higher than 700mg/L can be determined by diluting the proportion of water samples.
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