| 详细介绍： 美国CHEMetrics R-1805 二苯基卡巴补充试剂包
Carbohydrazide CHEMets Refill
Catalog No. R-1805
Method: PDTS
30 ampoules
Visual Kits| Range |
MDL |
Method |
Kit Catalog No. |
Refill Catalog No. |
| 0-0.50 & 0.50-4.0 ppm |
0.05 ppm |
PDTS |
K-1805 |
R-1805 |
Instrumental Kits| Range |
Method |
Kit Catalog No. |
| 0.10-2.50 ppm |
PDTS |
K-1803 |
Method
Carbohydrazide is added to boiler system water as an oxygen scavenger to control corrosion. It is a safer alternative to hydrazine, which is toxic. Carbohydrazide reacts with oxygen at low temperatures and pressures. The products of the reaction are volatile and do not contribute dissolved solids to the boiler water. Like hydrazine, carbohydrazide will also passivate metal surfaces.The PDTS Method
Reference: G. Frederick Smith Chemical Co., The Iron Reagents, 3rd ed., p. 47 (1980).The test kits employ the PDTS chemistry. Carbohydrazide reduces ferric iron to the ferrous state, and the ferrous iron reacts with PDTS (3-(2-pyridyl)-5,6-bis(4-phenylsulfonic acid)-1,2,4-triazine disodium salt) to form a peach-pink colored complex in direct proportion to the carbohydrazide concentration. Test results are expressed as ppm (mg/L) carbohydrazide.
美国CHEMetrics中国代理商：上海益朗仪器有限公司。
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