Total Sulfur Colorimetric Analysis Test tube Dolphin Brａnd S-HX-10 Model Sulfide Content Test Tube works on the principle that 4-amine-N. N-dimethylaniline dihydrochloride feric chloride and sulfite irons all ransform into methylene blue in acidic solutions. It is one of the oil field injected water quality test tube serirs which is first manufactured by the Ministry of Petroleum Industry in our country. It has been used by Daqing, Shengli, Zhongyuan, Xinjiang oil Fields, etc. and is appraised and approved by the users. This product has higher quality of sensitivity ,accuracy and anti-interference.. It is an ideal high-speed instrument which is simple and convenient to operate .It gives good results. It is ideal for field operation in testing sulfide content in water . Test range: 0-10ppm Production validity: 1 year Package: 30 pieces / box Storage conditions: room temperature, dark storage It needs to be used together with sulfur standard colorimetric tube and AB component of developer. | 产品图片：   |
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