CN2560944Y - Rapid colourimetric determining tube of nitrite in water - Google Patents

Abstract

The utility model relates to a nitrite tester in water quality, in particular to a color comparison rapid measuring tube for nitrite in water quality, which comprises a constant section glass cylinder with vacuum. A glass-capillary section communicated with the constant section glass cylinder with vacuum is arranged on an end of the constant section glass cylinder with vacuum. The glass cylinder with vacuum is filled with nitrite measuring solution A or B. The measuring solution includes quinone-imine dyes, coordination acid and solution with finite concentration, three of which are mixed as per proper volumetric ratio. The ration of measuring solution A or B height H#-1, the constant section space height H#-2, H#-1: H#-2 is 1: (3-6). The measuring solution reagent in the measuring tube is innoxious and harmless, and the testing data is rapid, exact and reliable. The utility model can be used for deep site testing, has extensive purposes for environmental protection, aquiculture and sewerage treatment, has important operation significance for the site monitoring of water quality and good economic and social benefit.

Description

Nitrite colorimetric fast measuring pipe in the water quality

(1) technical field: the utility model relates to a kind of utensil of measuring nitrite, particularly relates to a kind of colorimetric fast measuring pipe of nitrite.

(2) background technology: detect in the water quality whether have the nitrite material, its significant meaning is arranged.If the nitrite in the water quality enters in the blood of human body circulation, can make the normal haemoglobin of human body (low Ferri-hemoglobin) be oxidized to methemoglobin, make haemoglobin lose the ability of delivering oxygen in vivo, cause tissue the symptom of anoxic to occur.In addition, nitrite can with secondary amine class substance reaction, generate and to have carcinogenicity nitrous acid amine material, so detect the nitrite in the water quality, have special meaning and value.Another characteristic of nitrite is subject to microbial action and very unstable in water, based on this characteristic, the detection of content of nitrite should be carried out at the scene in the water quality, promptly with water sampling, tests immediately at any time, could detect the truth of on-the-spot water sample like this.Nitrite in the traditional detection water quality generally adopts the spectrophotometric method or the chromatography of ions, must use instrument and equipment and professional's test, traditional detection method can't be realized on-the-spot test, has only water sampling at the scene, preserve water sample at 4 ℃ of environment, fetching the laboratory should test immediately, otherwise the data of surveying can't be represented its authenticity.

Adopt Spectrophotometric Determination of Nitrite, spectrophotometric method adopts diazonium-coupling reaction usually, employed coupling reagent generally is alpha-naphthylamine and N-(1 naphthyl)-ethylenediamine, all is strong carcinogen, might enter human body by skin contact or respiratory tract.And this type of reagent instability was generally only preserved one month under 2～5 ℃ of conditions, and the testing staff will often contact this material inevitably.

Its operation steps, (one), reagent preparation: 1. phosphoric acid, 2. diazo reagent, 3. coupling reagent, 4. diazonium-coupling reagent, 5. nitrite standard solution, 6. liquor potassic permanganate, 7. sodium oxalate standard solution.(2), demarcate the nitrite standard solution, (using titrimetry), (3), make working curve, prepare the nitrite standard of a series of variable concentrations and use liquid, adding respectively after diazonium-coupling reagent leaves standstill 20 minutes, measure corresponding absorbance with spectrophotometric, is horizontal ordinate with the concentration value, absorbance is an ordinate, makes working curve.(4), the test water sample, regulate the water sample pH value with phosphoric acid, add diazonium-coupling reagent, then by the same steps as of making working curve, measure the absorbance of water sample, find the nitrite concentration value of water sample from working curve.The used reagent of Spectrophotometric Determination of Nitrite is many, and it is numerous and diverse, time-consuming to work, testing staff's contact be that some are strong carcinogens, be harmful to health.

(3) utility model content: the purpose of this utility model is: adopt new method to measure nitrite, make nitrite colorimetric fast measuring pipe in the water quality.

The technical solution of the utility model is: nitrite colorimetric fast measuring pipe in a kind of water quality, include prismatic glass tube with vacuum, have the glass capillary section that is communicated with the uniform cross section glass tube with vacuum at uniform cross section glass tube with vacuum one end, the mensuration liquid A or the B that detect nitrite are housed in pipe, measure the height H of liquid A or B ₁With the leave a blank height H of glass pipeline section of uniform cross section ₂Between ratio all be H ₁: H ₂Equal 1: (3～6).

Measure among the liquid A and contain 10% quinoneimine dye, 40% coordination acid, solvent, the three mixes according to a certain volume.

Coordination acid can be phosphoric acid, and solvent can be ethanol, or is acetone, or is distilled water, or is deionized water, or is the molecular film filtered water.

Measure among the liquid B and contain 1% quinoneimine dye, 40% coordination acid, solvent, the three mixes by certain volume ratio.

40% coordination acid can be the acid mixture that 20% sulfuric acid adds 20% phosphoric acid, and solvent can be ethanol, or is acetone, or is distilled water, or is deionized water, or is molecule membrane filtration water.

Useful good effect of the present utility model:

(1) kapillary that fractures in water sample, water sample charge into to measure automatically measures the liquid reaction solution in the Guan Bingyu pipe, treated in about 2 minutes behind the colour stable directly and the contrast of standard colour code, can read nitrite concentration value in the water sample, assay method novelty, quick.

(2) measure liquid sealing in measuring pipe, needn't repeat preparation, with the measuring technology commercialization, test products is for measuring pipe.Simplify determination step greatly, reduce labour intensity greatly, shorten the test duration greatly.

(3) mensuration liquid reagent itself is nontoxic, does not have pollution, and is healthy harmless to the testing staff.

(4) chromogenic reaction of mensuration liquid and determinand nitrite is to finish in measuring pipe, cuts down the number of intermediate links, and noiseless, testing result accurately and reliably.

(5) another kind of characteristics of the present utility model are: implement to detect the Other Instruments equipment that do not need, not electricity consumption, easily popularize, be specially adapted to on-the-spot the detection, the utility model can be widely used in potable water, surface water, underground water, sanitary sewage, industrial waste water, aquaculture, the mensuration of nitrite in the water quality such as soilless culture water.On-site supervision has important practical usage to the present technique product for water quality.

(4) description of drawings:

Fig. 1 is that nitrite is measured the tubular construction synoptic diagram in the water quality.

(5) embodiment: implement nitrite colorimetric fast measuring pipe in the water quality, at first to make a series of nitrite different contents, or title variable concentrations standard charomatron, form a series of standard color range color development system, and color fixed, make it colour-fast, charomatron makes its color accurate by spectrophotometer adjustment and demarcation.

Embodiment one, referring to Fig. 1,1 is uniform cross section glass tube with vacuum body among the figure, and 2 are the sealing capillary tube segment, and 3 for measuring liquid A, get 0.5ml 10% quinoneimine dye, 2ml 40% coordination acid phosphoric acid, the 1ml etoh solvent is made into and measures liquid 3.5ml, measure pipe uniform cross section overall diameter 7.5mm, overall height is 10cm, and kapillary height 2.0cm measures liquid A height H ₁With the height H of leaving a blank ₂Ratio got H 1: 3 ₁Be 2.0cm, H ₂Be 6cm.

Embodiment two, referring to Fig. 1, each the numbering represent meaning with embodiment one, do not repeat.Get 1ml 10% quinoneimine dye, 40% coordination acid, i.e. 20% sulfuric acid, 20% phosphoric acid acid mixture 3ml, solvent acetone 2.5ml is made into 6.5ml and measures liquid, measures the pipe physical dimension, with embodiment one, H ₁: H ₂=1: 4, get H1=1.6 (cm), H ₂=6.4 (cm).

Embodiment three, referring to Fig. 1, its structure and physical dimension thereof do not repeat with embodiment one.Get 1.5ml 10% quinoneimine dye, 40% coordination acid phosphatase 24 ml, etoh solvent 4ml is made into 9.5ml and measures liquid, H ₁: H ₂Got 1: 5, and got H ₁=1.33 (cm), H ₂=6.67 (cm).

Embodiment four: referring to Fig. 1, its structure and physical dimension thereof do not repeat with embodiment one.Get 1% quinoneimine dye 1ml, 20% sulfuric acid 2.5ml, 20% phosphoric acid 2.5ml, solvent is deionized water 5ml, is made into 11ml and measures liquid B, gets H ₁: H ₂=1: 4cm, H ₁Be 1.6cm, H ₂Be 6.4cm.

Claims (5)

1. nitrite colorimetric fast measuring pipe in the water quality, include prismatic glass tube with vacuum, it is characterized in that: have the glass capillary section that is communicated with the uniform cross section glass tube with vacuum at uniform cross section glass tube with vacuum one end, the mensuration liquid A or the B that detect nitrite are housed in pipe, measure the height H of liquid A or B ₁With the leave a blank height H of glass pipeline section of uniform cross section ₂Between ratio all be H ₁: H ₂Equal 1: (3～6).

2. mensuration pipe according to claim 1 is characterized in that: measures among the liquid A and contains 10% quinoneimine dye, and 40% coordination acid, solvent, the three mixes according to a certain volume.

3. mensuration pipe according to claim 1 and 2, it is characterized in that: coordination acid can be phosphoric acid, and solvent can be ethanol, or is acetone, or is distilled water, or is deionized water, or is the molecular film filtered water.

4. mensuration pipe according to claim 1 is characterized in that: measures among the liquid B and contains 1% quinoneimine dye, and 40% coordination acid, solvent, the three mixes by certain volume ratio.

5. according to claim 1 or 4 described mensuration pipes, it is characterized in that: 40% coordination acid, can be the acid mixture that 20% sulfuric acid adds 20% phosphoric acid, solvent can be ethanol, or is acetone, or is distilled water, or is deionized water, or is molecule membrane filtration water.

Images