CN102128833A - Reagent kit for detecting residual chlorine in water - Google Patents
Reagent kit for detecting residual chlorine in water Download PDFInfo
- Publication number
- CN102128833A CN102128833A CN 201010617573 CN201010617573A CN102128833A CN 102128833 A CN102128833 A CN 102128833A CN 201010617573 CN201010617573 CN 201010617573 CN 201010617573 A CN201010617573 A CN 201010617573A CN 102128833 A CN102128833 A CN 102128833A
- Authority
- CN
- China
- Prior art keywords
- chlorine
- reagent kit
- water
- water quality
- total
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention relates to a reagent kit for detecting residual chlorine in water, which comprises a free-chlorine detecting reagent kit and a total-chlorine detecting reagent kit, wherein the reagent kit is prepared by mixing solid buffer, color-developing agent and masking agent in proportion; the free-chlorine detecting reagent kit is prepared by mixing the solid buffer, free-chlorine color-developing agent and masking agent in weight ratio of 16:1:1; and the total-chlorine detecting reagent kit is prepared by mixing the solid buffer, total-chlorine color-developing agent and masking agent in weight ratio of 16:19:1. The reagent kit provided by the invention is conveniently, quickly and accurately used. By the invention, the inconvenience and difficulties in the application of the original liquid reagent can be overcome and the quality guarantee period of the detecting reagent can be prolonged, and the reagent kit fully meets the requirement of residual chlorine detection in chlorination disinfection commonly used in various industries. Besides, the proportion of buffer is large in the reagent kit and the buffer can be used for buffering the pH values of various types of surface water and underground water, as well as industrial sewage and sanitary sewage, therefore the pH value of a detected water sample is not necessary to adjust when the reagent kit is used in the detection. The reagent kit is more convenient to use and has high popularization value and use value.
Description
Technical field
The present invention relates to water analysis and measure the chemical reagent of usefulness, particularly a kind of water quality chlorine residue detectable bag.
Background technology
According to the requirement of country to the drinking water quality health: all centralized water supplies, output water all should be sterile-processed, and the surplus of sanitizer all should meet national GB5749-2006 " drinking water sanitary standard " in output water and the pipe network tip water.Sanitizer kind to water sterilization is a lot, liquid chlorine is arranged, chlorine dioxide, ozone, ultraviolet ray or the like is with regard to Disinfection Effect, overall targets such as disinfection cost and pipe network tip sanitizer maintenance dose, the most popular still chlorhexidine-containing disinfectant of sanitizer in the at present domestic and international Drinking Water, other water sterilization such as industrial waste water and sanitary sewage adopt the just more extensive of chlorination.Can react the quality of Disinfection Effect to a certain extent to the detection of residual chlorine amount in the water, the method that the past chlorine residue detects adopts o-tolidine colorimetric method more, because o-tolidine reagent is doubtful strong carcinogen, and existing many these detection methods of having abolished.Both at home and abroad at present N.N-diethyl 1 that adopt more, 4-phenylenediamine spectrophotometric method (being called for short the DPD method), GB GB/T5750.11-2006 " Drinking Water water examination method " and the GB11898-89 " mensuration N.N-diethyl 1 of water quality free chlorine and total chlorine, 4-phenylenediamine spectrophotometric method " and international standard ISO 7392/2-1985 " mensuration-part 2 of water quality free chlorine and total chlorine: N.N-diethyl 1,4-phenylenediamine colourimetry. conventional control with " wait in the standard test method and all have the DPD spectrophotometric to check the concrete grammar of water quality chlorine residue, its method of inspection principle all is: under PH6.2～6.5 conditions, direct and the N.N-diethyl 1 of chlorine residue, 4-phenylenediamine (DPD) reaction generates red compound, the depth of its color is directly proportional with concentration, with its absorbance of metric measurement, get final product corresponding concentration.Detect chlorine residue with this method and have heavy good linearity, the accuracy advantages of higher, but the detection that the character of chlorine residue has determined chlorine residue in the water is sampling and measuring at the scene preferably, just representative, chlorine residue has strong oxidizing property and instability in the water, run into microorganism or reducing substances are arranged in the water, light etc. all will be consumed, preserve also difficult, so the mensuration of chlorine residue is wanted to measure immediately behind the spot sampling, avoid high light from start to finish, jolting and warm, this brings a lot of inconvenience to the analyst, and a lot of reagent and instrument will be carried in the scene, and these reagent all will be mixed with certain density liquid in advance in the laboratory, the scene of taking to is again measured, and the DPD developer also must be in brown bottle after being made into liquid, preserves in the refrigerator, otherwise will soon lose efficacy the accuracy that influence is measured.
State Standard of the People's Republic of China's " mensuration N.N-diethyl 1 of water quality free chlorine and total chlorine, 4-phenylenediamine spectrophotometric method " exposure draft be on-site measurement method among the new replacement standard GB11898-89, its method is: add the DPD solution of recommendation sample size 1/20 volume and the phosphate buffered solution of 1/20 volume in sample cup or pipe, add instrument then and recommend the sample of sample volume (adding the liquor kalii iodide of recommending sample size 1/10 volume when surveying total chlorine again), colorimetric estimation behind the mixing.The detectable that relates in this assay method all is a liquid reagent, according to calculating, its effective content of these liquid reagents that adds in the water sample during mensuration is considerably less, if directly carrying out the content mixing according to liquid fraction is to realize the reagent solids package, therefore need to change ratio of reagents, make it neither to influence water determination and can realize good solid hybrid process technology again.
Summary of the invention
The present invention is on the basis of national standard and international standard chlorine residue check and analysis method, measuring used liquid reagent by calculating in proportion, be mixed into a solid reagent bag, compare with national standard method by the measured chlorine content of this pack and to have equal measurement result, inconvenience when solving the on-site measurement chlorine residue and difficult, also overcome simultaneously problems such as the instability of liquid reagent and shelf-life be short, thereby a kind of water quality chlorine residue detectable bag is provided.
The present invention adopts following technical proposals to solve its technical matters:
A kind of water quality chlorine residue detectable bag comprises free chlorine mensuration pack and total chlorine measurement pack, is mixed and made in proportion by solid buffering agent, developer and screening agent.
Described free chlorine is measured pack and is mixed and made into by solid buffering agent, free chlorine developer and the screening agent weight ratio by 16: 1: 1, and weight per package is 0.1g.
The free chlorine developer is: N.N-diethyl 1,4-phenylenediamine, be called for short DPD.
Described N.N-diethyl 1,4-phenylenediamine comprises any DPD salt soluble in water in DPD sulfate, DPD oxalates, the DPD hydrochloride.
Described total chlorine measurement pack is mixed and made into by solid buffering agent, total chlorine developer and the screening agent weight ratio by 16: 19: 1, and weight per package is 0.2g.
Described total chlorine developer is: the potpourri of N.N-diethyl 1,4-phenylenediamine and potassium iodide, proportioning are 1: 18.
Described solid buffering agent is mixed with 12: 23 weight ratio by ADSP and anhydrous potassium dihydrogenphosphate and forms.
Described screening agent is a disodium ethylene diamine tetraacetate, ethylenediaminetetraacetic acid-2Na.
Mentioned reagent all is as the criterion to analyze pure or above reagent grade, only need be during detection with a last portable spectrophotometer or special-purpose chlorine residue color comparator or colorimetric card, to on-the-spot with the water sample cup water sample 5ml～50ml to be measured that takes a morsel, require to determine sampling amount according to the water sample cup that carries instrument, add the free chlorine pack when surveying free chlorine, add up the chlorine reagent bag when surveying total chlorine, once use a bag.Get water sample 5 ~ 50ml to be measured and add a bag reagent, can detect the chlorine residue of 0.02～2.0mg/l concentration range; Get the chlorine residue that can enlarge sensing range to 1.0～8.0mg/l when the 5ml water sample adds two bag reagent.This pack is easy to use, quick, accurate, has solved original a lot of inconvenience and difficulty when the liquid reagent, has also prolonged the shelf-life of detectable, the demand that in the time of can satisfying the most of chlorination of present every profession and trade fully chlorine residue is detected.This proportioning buffering agent accounts for large percentage in addition, and the PH of the various day water of available buffer and underground water and most of industrial waste water and sanitary sewage makes when detecting and need not regulate the PH of detected water sample again, uses more conveniently, has the excellent popularization value and use value.
Embodiment
Embodiment 1
1, the preparation of solid buffering agent: accurately take by weighing ADSP 24g and anhydrous potassium dihydrogenphosphate 46g and mix stand-byly, the pH value of the water-soluble back of this buffering agent buffer solution is 6.5;
2, the preparation of total chlorine developer: accurately take by weighing 1.0g DPD sulfate and the 18g potassium iodide mixes stand-by;
3, the making of total chlorine reagent bag: accurately take by weighing solid buffering agent 16g, total chlorine developer 19g and screening agent EDTA-2Na 1.0g respectively, lucifuge, sealed package become the pouch-packaged of 0.2g/ bag, the moistureproof preservation immediately after mixing.
Embodiment 2
1, the preparation of solid buffering agent: accurately take by weighing ADSP 24g and anhydrous potassium dihydrogenphosphate 46g and mix stand-byly, the pH value of the water-soluble back of this buffering agent buffer solution is 6.5;
2, the making of free chlorine pack: take by weighing solid buffering agent 16g, free chlorine developer DPD hydrochloride 1.0g and screening agent EDTA-2Na 1.0g respectively, lucifuge, sealed package become the pouch-packaged of 0.1g/ bag, the moistureproof preservation immediately after mixing.
Embodiment 3
1, the preparation of solid buffering agent: accurately take by weighing ADSP 24g and anhydrous potassium dihydrogenphosphate 46g and mix stand-byly, the pH value of the water-soluble back of this buffering agent buffer solution is 6.5;
2, the preparation of total chlorine developer: accurately take by weighing 1.0g DPD oxalates and the 18g potassium iodide mixes stand-by;
3, the making of total chlorine reagent bag: accurately take by weighing solid buffering agent 16g, total chlorine developer 19g and screening agent EDTA-2Na 1.0g respectively, lucifuge, sealed package become the pouch-packaged of 0.2g/ bag, the moistureproof preservation immediately after mixing.
Embodiment 4
1, the preparation of solid buffering agent: accurately take by weighing ADSP 24g and anhydrous potassium dihydrogenphosphate 46g and mix stand-byly, the pH value of the water-soluble back of this buffering agent buffer solution is 6.5;
2, the making of free chlorine pack: take by weighing solid buffering agent 16g, free chlorine developer DPD sulfate 1.0g and screening agent EDTA-2Na 1.0g respectively, lucifuge, sealed package become the pouch-packaged of 0.1g/ bag, the moistureproof preservation immediately after mixing;
3, the making of total chlorine reagent bag: get one bag of free chlorine pack (0.1g/ bag), adding 0.1g potassium iodide repacks and just becomes total chlorine reagent bag.
Claims (8)
1. a water quality chlorine residue detectable bag is characterized in that comprising free chlorine mensuration pack and total chlorine measurement pack, is mixed and made in proportion by solid buffering agent, developer and screening agent.
2. water quality chlorine residue detectable bag according to claim 1 is characterized in that described free chlorine mensuration pack is mixed and made into by solid buffering agent, free chlorine developer and the screening agent weight ratio by 16: 1: 1.
3. water quality chlorine residue detectable bag according to claim 2 is characterized in that described free chlorine developer is: N.N-diethyl 1,4-phenylenediamine.
4. water quality chlorine residue detectable bag according to claim 3 is characterized in that described N.N-diethyl 1,4-phenylenediamine comprises any DPD salt soluble in water in DPD sulfate, DPD oxalates, the DPD hydrochloride.
5. water quality chlorine residue detectable bag according to claim 1 is characterized in that described total chlorine measurement pack is mixed and made into by solid buffering agent, total chlorine developer and the screening agent weight ratio by 16: 19: 1.
6. water quality chlorine residue detectable bag according to claim 5, it is characterized in that described total chlorine developer is: the potpourri of N.N-diethyl 1,4-phenylenediamine and potassium iodide, proportioning are 1: 18.
7. water quality chlorine residue detectable bag according to claim 1 is characterized in that described solid buffering agent is mixed with 12: 23 weight ratio by ADSP and anhydrous potassium dihydrogenphosphate to form.
8. water quality chlorine residue detectable bag according to claim 1 is characterized in that described screening agent is a disodium ethylene diamine tetraacetate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010617573 CN102128833A (en) | 2010-12-31 | 2010-12-31 | Reagent kit for detecting residual chlorine in water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010617573 CN102128833A (en) | 2010-12-31 | 2010-12-31 | Reagent kit for detecting residual chlorine in water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102128833A true CN102128833A (en) | 2011-07-20 |
Family
ID=44267003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010617573 Pending CN102128833A (en) | 2010-12-31 | 2010-12-31 | Reagent kit for detecting residual chlorine in water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102128833A (en) |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928361A (en) * | 2012-10-10 | 2013-02-13 | 上海大学 | Separation detection method for mixture of hypobromous acid and bromine amine |
| CN102937579A (en) * | 2012-10-31 | 2013-02-20 | 广东环凯微生物科技有限公司 | Rapid determination tablet for free chlorine residuals for water quality on the spot and preparation method thereof |
| CN103207158A (en) * | 2013-04-17 | 2013-07-17 | 上海绿帝环保科技有限公司 | Water quality detecting agent for residual chlorine |
| CN103293121A (en) * | 2013-05-29 | 2013-09-11 | 上海市计量测试技术研究院 | Residual chlorine standard substance, application of residual chlorine standard substance and residual chlorine tester correction or calibration method |
| EP2784503A1 (en) * | 2013-03-29 | 2014-10-01 | LaMotte Chemical Products Company | Reagent for Detection and Assessment of Free Chlorine in Aqueous Solution |
| EP2784502A1 (en) * | 2013-03-29 | 2014-10-01 | LaMotte Chemical Products Company | Reagent for detection and assessment of total chlorine in aqueous solution |
| CN104406965A (en) * | 2014-11-24 | 2015-03-11 | 苏州东辰林达检测技术有限公司 | Kit for quickly detecting residual chlorine in water sample and use method of kit |
| CN105606554A (en) * | 2016-03-07 | 2016-05-25 | 上海仪电科学仪器股份有限公司 | Method for measuring free chlorine and total chlorine in water |
| CN106770252A (en) * | 2016-12-31 | 2017-05-31 | 郑州贯奥仪器仪表有限公司 | A kind of Remanent Chloride In Drinking Water detection reagent and its application |
| CN108351337A (en) * | 2015-10-30 | 2018-07-31 | 哈希公司 | The reference substance of stable storing for the analysis of aqueous chlorine |
| CN108344848A (en) * | 2018-02-06 | 2018-07-31 | 山东五洲检测有限公司 | It is a kind of to be used to detect water quality detection agent of chlorine in water and preparation method thereof |
| CN109406425A (en) * | 2018-11-13 | 2019-03-01 | 上海仪电科学仪器股份有限公司 | For detecting detection agent of chlorine dioxide and preparation method thereof and detection method in water |
| CN109612951A (en) * | 2018-11-13 | 2019-04-12 | 上海仪电科学仪器股份有限公司 | For detecting chlorine residue in water/total chlorine detection agent and preparation method thereof and detection method |
| CN110161026A (en) * | 2019-06-14 | 2019-08-23 | 安徽理工大学 | The centrifugal type microfludic chip of chlorine residue in a kind of DPD spectrophotometry water |
| CN110411964A (en) * | 2019-08-13 | 2019-11-05 | 广州怡和生物科技有限公司 | A kind of chlorine residue detection kit |
| CN111458329A (en) * | 2020-03-05 | 2020-07-28 | 力合科技（湖南）股份有限公司 | Total chlorine and residual chlorine analysis method |
| CN111474168A (en) * | 2020-03-05 | 2020-07-31 | 力合科技（湖南）股份有限公司 | Residual chlorine analysis method |
| CN111504993A (en) * | 2020-05-06 | 2020-08-07 | 中国检验检疫科学研究院 | Ballast water disinfection residual chlorine rapid detection kit |
| CN111537503A (en) * | 2020-04-13 | 2020-08-14 | 力合科技（湖南）股份有限公司 | Sulfide analysis method and automatic analyzer |
| CN113720830A (en) * | 2020-05-25 | 2021-11-30 | 杭州科莱迪环保技术有限公司 | High-efficiency water residual chlorine detection reagent |
| CN114460070A (en) * | 2021-12-31 | 2022-05-10 | 桂林优利特医疗电子有限公司 | Preparation method and application of test paper for detecting residual chlorine and total chlorine in water |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1603799A (en) * | 2004-11-09 | 2005-04-06 | 江西瑞祺科技贸易有限公司 | Water quality test agent for chloride ion |
| CN101241080A (en) * | 2008-01-25 | 2008-08-13 | 黄晓平 | Convenient colorimetric technique for detecting subaqueous polymorphic chlorine and its color comparator |
| JP2008233108A (en) * | 2008-06-16 | 2008-10-02 | Shinfuji Kaseiyaku Kk | Reagent for free residual chlorine measurement |
-
2010
- 2010-12-31 CN CN 201010617573 patent/CN102128833A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1603799A (en) * | 2004-11-09 | 2005-04-06 | 江西瑞祺科技贸易有限公司 | Water quality test agent for chloride ion |
| CN101241080A (en) * | 2008-01-25 | 2008-08-13 | 黄晓平 | Convenient colorimetric technique for detecting subaqueous polymorphic chlorine and its color comparator |
| JP2008233108A (en) * | 2008-06-16 | 2008-10-02 | Shinfuji Kaseiyaku Kk | Reagent for free residual chlorine measurement |
Non-Patent Citations (2)
| Title |
|---|
| 《分析试验室》 20000131 王镇浦 等 反向流动注射-分光光度法测定水中痕量余氯的研究 全文 1-8 第19卷, 第1期 2 * |
| 《环境工程》 20030228 曹连城 DPD光度法测定水中余氯 全文 1-8 第21卷, 第1期 2 * |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928361A (en) * | 2012-10-10 | 2013-02-13 | 上海大学 | Separation detection method for mixture of hypobromous acid and bromine amine |
| CN102928361B (en) * | 2012-10-10 | 2015-01-07 | 上海大学 | Separation detection method for mixture of hypobromous acid and bromine amine |
| CN102937579B (en) * | 2012-10-31 | 2014-08-27 | 广东环凯微生物科技有限公司 | Rapid determination tablet for free chlorine residuals for water quality on the spot and preparation method thereof |
| CN102937579A (en) * | 2012-10-31 | 2013-02-20 | 广东环凯微生物科技有限公司 | Rapid determination tablet for free chlorine residuals for water quality on the spot and preparation method thereof |
| US8987000B2 (en) | 2013-03-29 | 2015-03-24 | LaMotte Chemical Products Company | Reagent for detection and assessment of free chlorine in aqueous solution |
| EP2784503A1 (en) * | 2013-03-29 | 2014-10-01 | LaMotte Chemical Products Company | Reagent for Detection and Assessment of Free Chlorine in Aqueous Solution |
| EP2784502A1 (en) * | 2013-03-29 | 2014-10-01 | LaMotte Chemical Products Company | Reagent for detection and assessment of total chlorine in aqueous solution |
| US8993337B2 (en) | 2013-03-29 | 2015-03-31 | LaMotte Chemical Products Company | Reagent for detection and assessment of total chlorine in aqueous solution |
| CN103207158A (en) * | 2013-04-17 | 2013-07-17 | 上海绿帝环保科技有限公司 | Water quality detecting agent for residual chlorine |
| CN103293121A (en) * | 2013-05-29 | 2013-09-11 | 上海市计量测试技术研究院 | Residual chlorine standard substance, application of residual chlorine standard substance and residual chlorine tester correction or calibration method |
| CN103293121B (en) * | 2013-05-29 | 2015-12-23 | 上海市计量测试技术研究院 | Chlorine residue standard substance, its purposes and chlorine residual measurement instrument calibration or verification method |
| CN104406965A (en) * | 2014-11-24 | 2015-03-11 | 苏州东辰林达检测技术有限公司 | Kit for quickly detecting residual chlorine in water sample and use method of kit |
| CN108351337A (en) * | 2015-10-30 | 2018-07-31 | 哈希公司 | The reference substance of stable storing for the analysis of aqueous chlorine |
| CN105606554A (en) * | 2016-03-07 | 2016-05-25 | 上海仪电科学仪器股份有限公司 | Method for measuring free chlorine and total chlorine in water |
| CN106770252A (en) * | 2016-12-31 | 2017-05-31 | 郑州贯奥仪器仪表有限公司 | A kind of Remanent Chloride In Drinking Water detection reagent and its application |
| CN108344848A (en) * | 2018-02-06 | 2018-07-31 | 山东五洲检测有限公司 | It is a kind of to be used to detect water quality detection agent of chlorine in water and preparation method thereof |
| CN109406425A (en) * | 2018-11-13 | 2019-03-01 | 上海仪电科学仪器股份有限公司 | For detecting detection agent of chlorine dioxide and preparation method thereof and detection method in water |
| CN109612951A (en) * | 2018-11-13 | 2019-04-12 | 上海仪电科学仪器股份有限公司 | For detecting chlorine residue in water/total chlorine detection agent and preparation method thereof and detection method |
| CN110161026A (en) * | 2019-06-14 | 2019-08-23 | 安徽理工大学 | The centrifugal type microfludic chip of chlorine residue in a kind of DPD spectrophotometry water |
| CN110411964A (en) * | 2019-08-13 | 2019-11-05 | 广州怡和生物科技有限公司 | A kind of chlorine residue detection kit |
| CN111458329A (en) * | 2020-03-05 | 2020-07-28 | 力合科技（湖南）股份有限公司 | Total chlorine and residual chlorine analysis method |
| CN111474168A (en) * | 2020-03-05 | 2020-07-31 | 力合科技（湖南）股份有限公司 | Residual chlorine analysis method |
| CN111537503A (en) * | 2020-04-13 | 2020-08-14 | 力合科技（湖南）股份有限公司 | Sulfide analysis method and automatic analyzer |
| CN111504993A (en) * | 2020-05-06 | 2020-08-07 | 中国检验检疫科学研究院 | Ballast water disinfection residual chlorine rapid detection kit |
| CN113720830A (en) * | 2020-05-25 | 2021-11-30 | 杭州科莱迪环保技术有限公司 | High-efficiency water residual chlorine detection reagent |
| CN114460070A (en) * | 2021-12-31 | 2022-05-10 | 桂林优利特医疗电子有限公司 | Preparation method and application of test paper for detecting residual chlorine and total chlorine in water |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102128833A (en) | Reagent kit for detecting residual chlorine in water | |
| Raposo et al. | Assessment of a modified and optimised method for determining chemical oxygen demand of solid substrates and solutions with high suspended solid content | |
| CN108776134B (en) | One kind being based on the iodide ion detection reagent and method of catalysis of iodine hydrazine-[oxidant-Ferroin reagent] system | |
| CN101793902A (en) | Device for fluidly injecting and rapidly analyzing residual chlorine of water quality and analysis method thereof | |
| CN104034891A (en) | Method and kit for quantitatively measuring beta-glucuronidase in multiple samples by enzyme-linked immunosorbent assay (ELIASA) instrument | |
| CN105021608A (en) | Kit for detecting total polyphenol content in beverage, preparation method of kit and method for detecting total polyphenol content in beverage using kit | |
| CN103207158A (en) | Water quality detecting agent for residual chlorine | |
| Silva et al. | Application of sequential injection-monosegmented flow analysis (SI-MSFA) to spectrophotometric determination of sulfide in simulated waters samples | |
| CN105277535B (en) | Ammonia nitrogen field fast detection method in a kind of water for eliminating reagent blank influence | |
| CN109612951A (en) | For detecting chlorine residue in water/total chlorine detection agent and preparation method thereof and detection method | |
| CN104406965A (en) | Kit for quickly detecting residual chlorine in water sample and use method of kit | |
| CN103018183A (en) | Kit and method used for monitoring hexavalent chromium online | |
| CN105606554A (en) | Method for measuring free chlorine and total chlorine in water | |
| CN109406425A (en) | For detecting detection agent of chlorine dioxide and preparation method thereof and detection method in water | |
| CN103293121A (en) | Residual chlorine standard substance, application of residual chlorine standard substance and residual chlorine tester correction or calibration method | |
| CN110286196A (en) | A method of with quick, Accurate Determining drinking water chlorine residue on site | |
| CN104374714B (en) | Detection agent for determining water alkalinity | |
| CN201075084Y (en) | Kit for rapidly measuring chromium in water | |
| Shriwastav et al. | Modification of Winkler's method for determination of dissolved oxygen concentration in small sample volumes | |
| CN204203105U (en) | Water body ammonia-nitrogen content speed check reagent box | |
| CN106770252A (en) | A kind of Remanent Chloride In Drinking Water detection reagent and its application | |
| CN112798585A (en) | Color development tube for on-site determination of ferrous concentration in water and detection method | |
| CN109211811B (en) | Detection method of iron blue content | |
| CN104374771B (en) | A kind of kit and its detection method of quick detection water body ammonia-nitrogen content | |
| CN207488193U (en) | A kind of chlorine residue detection device for photoelectric colorimetry |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110720 |