Double Filter Concentration Method as a Pretreatment for the Determination of Iron in Ultra-supercritical Pressure Boiler Feedwater

被引：0

作者：

Ureshino, Ayako ^{[1
]}

Sawatsubashi, Tetsuya ^{[1
]}

Inozaki, Tuuniro ^{[1
]}

Isubakizaki, Serum. ^{[2
]}

Tsunoda, Jun ^{[2
]}

Shimoda, Syo ^{[2
]}

Kanda, Misato ^{[3
]}

机构：

[1] Mitsubishi Heavy Ind Co Ltd, Nagasaki 8510392, Japan

[2] Mitsubishi Hitachi Power Syst Ltd, Nagasaki 8508610, Japan

[3] Choryo Engneering CO Ltd, Nagasaki 8510392, Japan

来源：

BUNSEKI KAGAKU | 2015年 / 64卷 / 08期

关键词：

membrane filter; chelate filter; TPTZ; iron;

D O I：

暂无

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

We developed a concentration method using a double filter as a pre-treatment. We call it the "Double filter concentration method". It is a pre-treatment method for the determination of traces of iron by 2,4,6-tris(2-pyridyl)-1,3,5-triazine (TPTZ) absorption photometry. It is important to monitor iron concentration in an ultra-supercritical pressure boiler applying an oxygen treatment method as a water treatment. Because the iron in feedwater forms a hematite, it is necessary to control the iron concentration in the feedwater at less than 2 mu g L-1 so as to prevent problems. Therefore, a quick and effective analysis method is necessary on site. The double filter is constructed in the membrane filter and chelate filter having iminodiacetic acid groups. Iron particles are trapped by the membrane filter, and the dissolved iron are trapped by the chelate filter. When we applied this developed method, we were able to measure the low range iron concentrations. This method is suitable for on-site analysis because it can also shorten the analysis time.

引用

页码：609 / 615

页数：7