亚硝酸盐测试盒 VISOCOLOR® ECO Nitrite（德国MN）
◆可测试的亚硝酸盐范围是0-0.02-0.03-0.05-0.07-0.1-0.2-0.3-0.5mg/LNO2–,可使用120次，18个月保质期，试剂补充装的型号为 931 244.
说明内容 | 详细描述 |
测试原理 | 滴定计数法： |
目测法 |
不含危险特质，不会产生环境污染 |
价格经济 |
使用方便 |
具有更高的灵敏度和**性 |
由于分开滴定试剂，颜色变化更为明显 |
试剂瓶上清楚的标有用量说明 |
测试方法 | 1、在取样试管中加入样品溶液 |
2、加入指示试剂混合均匀 |
3、 逐滴加入滴定溶液 |
4、直到指示剂发生颜色变化 |
注计算滴数：1 滴=1 个测量单位，例如：1 °d |
Colorimetric determination of nitrite
Inacidic solution sulphanilic acid or sulphanilamide are diazotised with nitrite. The diazonium salt is then coupled with an aromatic amine, forming an intensely coloured azo dye. Organic colloids, chlorine, humic acids and coloured heavy metal ions interfere.(Reaction principle analogous to APHA 4500-NO2-B, EPA 35.1, DIN EN 26777-D10)
Data and ordering information
Cat. No. | 931 044 (931 244) |
Type | colorimetric test kit (refill pack) |
Range | 0-0.02-0.03-0.05-0.07-0.1-0.2-0.3-0.5 mg/l NO2– |
Sufficient for | 120 determinations |
Shelf life | at least 18 months |
Sea water suitability | yes |
Detectable with PF-11 | yes |
In surface waters nitrite ions are generally present in low concentrations. Their presence in ground water is less common. In waste waters nitrite frequently occurs, even in fairly high concentrations.
