Rapid detection of residual chlorine of disinfectant in water

(instructions for use of residual chlorine rapid measuring tube)

Video operation

1 scope of application: This product is applicable to the rapid detection of residual chlorine content after or during disinfection of swimming pool water, swimming pool foot soaking disinfection water, domestic drinking water, etc.

2 method principle: This product adopts DPD color development method, with high sensitivity, clear color and stable results. The detection range is 0~10mg / L, and the detection limit is 0.1mg/l.

3 operation method: take 1ml of the liquid to be tested into the rapid test tube containing solid reagent, shake the reagent, stand the rapid test tube upside down on the control color card, compare it with the color card within 3 ~ 5min, and find the same or similar color scale. The value marked under the color scale is the content of residual chlorine in the water sample, mg / L.

4 precautions: if the solution to be tested contains more than 0.1mg/l residual chlorine, the solution will change color, and the color depth of the solution is directly proportional to the residual chlorine content. When the residual chlorine content is high, the solution will become purplish red and finally purple. If it is found that part of the tube shows purplish red after sample addition and fades rapidly, it indicates that the chlorine content in the water may greatly exceed the upper limit of the detection tube. It is recommended to dilute it 10 ~ 1000 times before testing.

5 standard provisions:

5.1 the limit value of residual chlorine in the finished water of domestic drinking water and the end water of pipe network shall be ≤ 2mg / L, the residual chlorine in the finished water shall be ≥ 0.3mg/l, and the residual chlorine in the end water of pipe network shall be ≥ 0.05mg/l.

5.2 the residual chlorine in the water of artificial swimming pool shall be kept at 0.3 ~ 0.5mg/l.

5.3 the residual chlorine in the pool water should be kept at 5 ~ 10mg / L.

6 Product configuration: 30 detection tubes, 5 suction tubes (washed and reused), and 1 color card.

7 product storage and expiration date: the reagent is stored in closed light and cold storage, and the expiration date is 16 months.

水中消毒剂余氯的快速检测

（余氯速测管使用说明）（参照GB/T 5750.11 DPD法）

操作视频

方法编号：CDC3040

1 适用范围：本产品适用于泳池水、泳池浸脚消毒水、生活饮用水等消毒后或消毒过程中余氯含量的快速检测。

2 方法原理：本品采用DPD显色法，灵敏度高，色泽清晰，结果稳定。检测范围为0～10mg/L，检出限：0.1mg/L。

3 操作方法：取1mL待测液于装有固体试剂的速测管中，摇溶试剂后，将速测管倒立在对照色卡上，3～5min内与色卡比对，找到相同或相近的色阶，色阶下标示的数值即为水样中余氯的含量mg/L。

4 注意事项：如果待测液中含有超过0.1mg/L余氯时，溶液即会变色，溶液颜色的深浅与余氯含量成正比，当余氯的含量较高时，溶液成紫红色，最后成紫色。若发现加样后管中局部显示紫红色，并迅速褪去，提示水中的氯含量可能大大超出本检测管的检测上限，建议稀释10～1000倍后再测。

5 标准规定：

5.1生活饮用水出厂水和管网末梢水中余氯限值≤2mg/L，出厂水余氯≥0.3mg/L，管网末梢水中余氯≥0.05mg/L。

5.2 人工泳池水中余氯应保持在0.3～0.5mg/L。

5.3 泳池浸脚消毒池水中余氯应保持在5～10mg/L。

6 产品配备：检测管20支，吸管5支（冲洗干净可反复使用），比色卡1片。

7 产品储藏与效期：试剂闭光常温保存，有效期为16个月。

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