Method for testing total nitrogen by using flow injection analyzer and application thereof
The invention relates to a method for testing total nitrogen by using a flow injection analyzer, which is used for testing on the basis of the flow injection analyzer, and comprises the steps of (1) under the irradiation of ultraviolet light, adding a digestion solution into a water sample to be tes...
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| creator | LIN XIAOFENG XU JIN WANG JUAN LIANG XIAOZHOU HUANG MINGJIAN YANG ZONGXING CHEN YANLING HUANG ZUOXIN HUANG BINGJIE ZHAO HAIHUA |
| description | The invention relates to a method for testing total nitrogen by using a flow injection analyzer, which is used for testing on the basis of the flow injection analyzer, and comprises the steps of (1) under the irradiation of ultraviolet light, adding a digestion solution into a water sample to be tested, and heating to obtain a digestion product A; (2) adding a buffer solution into the digestion product A, and reducing to obtain a reduction product B; (3) adding a color developing agent into the reduction product B to obtain a to-be-detected substance C; and (4) measuring the absorbance value of the to-be-measured substance C, and calculating the corresponding total nitrogen concentration. Solutes of the buffer solution comprise acid, ammonia water and a metal chelating agent, so that ammonia nitrogen in the to-be-detected water sample can be prevented from escaping in the form of ammonia gas, the interference of metal ions and acid-base degree in the to-be-detected water sample on thetest accuracy is reduced, |
| format | Patent |
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Solutes of the buffer solution comprise acid, ammonia water and a metal chelating agent, so that ammonia nitrogen in the to-be-detected water sample can be prevented from escaping in the form of ammonia gas, the interference of metal ions and acid-base degree in the to-be-detected water sample on thetest accuracy is reduced,</description><language>chi ; eng</language><subject>INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES ; MEASURING ; PHYSICS ; TESTING</subject><creationdate>2020</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20201124&DB=EPODOC&CC=CN&NR=111982847A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,777,882,25545,76296</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20201124&DB=EPODOC&CC=CN&NR=111982847A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>LIN XIAOFENG</creatorcontrib><creatorcontrib>XU JIN</creatorcontrib><creatorcontrib>WANG JUAN</creatorcontrib><creatorcontrib>LIANG XIAOZHOU</creatorcontrib><creatorcontrib>HUANG MINGJIAN</creatorcontrib><creatorcontrib>YANG ZONGXING</creatorcontrib><creatorcontrib>CHEN YANLING</creatorcontrib><creatorcontrib>HUANG ZUOXIN</creatorcontrib><creatorcontrib>HUANG BINGJIE</creatorcontrib><creatorcontrib>ZHAO HAIHUA</creatorcontrib><title>Method for testing total nitrogen by using flow injection analyzer and application thereof</title><description>The invention relates to a method for testing total nitrogen by using a flow injection analyzer, which is used for testing on the basis of the flow injection analyzer, and comprises the steps of (1) under the irradiation of ultraviolet light, adding a digestion solution into a water sample to be tested, and heating to obtain a digestion product A; (2) adding a buffer solution into the digestion product A, and reducing to obtain a reduction product B; (3) adding a color developing agent into the reduction product B to obtain a to-be-detected substance C; and (4) measuring the absorbance value of the to-be-measured substance C, and calculating the corresponding total nitrogen concentration. 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Solutes of the buffer solution comprise acid, ammonia water and a metal chelating agent, so that ammonia nitrogen in the to-be-detected water sample can be prevented from escaping in the form of ammonia gas, the interference of metal ions and acid-base degree in the to-be-detected water sample on thetest accuracy is reduced,</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS TESTING |
| title | Method for testing total nitrogen by using flow injection analyzer and application thereof |
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