CN2551995Y - Fast colorimetric estimation tube for bicarbonate radical in water - Google Patents

Abstract

The utility model relates to an estimation apparatus for bicarbonate radical in water, in particular to a fast colorimetric estimation tube for bicarbonate radical in water. The tube has a vacuum glass tube with the equal section; one end of the vacuum glass tube with the equal section is provided with a capillary glass tube section which is communicated with the vacuum glass tube with the equal section; the tube is filled with estimation liquid for detecting the bicarbonate radical; the estimation liquid contains 1 percent of triphenylmethane acid dye, 1.5 percent of phosphate, and water; the volume ratio of the three parts is (3 to 5) : (1 to 2) : (4 to 6); the ration between the height H1 of the estimation liquid in the estimation tube and the blank height H2 of the equal section is equal to 1 : (4 to 6). The estimation tube has rapid, simple, and correct and reliable estimation result, and low cost, thereby greatly reducing the labor intensity and having favorable economic and social benefits.

Description

Bicarbonate radical colorimetric fast measuring pipe in the water quality

(1) technical field: the present invention relates to bicarbonate radical mensuration utensil in a kind of water quality, particularly relate to bicarbonate radical colorimetric fast measuring pipe in a kind of water quality.

(2) background technology: with regard to environmental protection; quality for a certain regional water quality of evaluation has great significance, because of it is related to the healthy and survival and development of living in a certain regional people; bicarbonate radical, the summation of carbonate and oxyhydroxide can be used for evaluating the basicity in the water.The basicity index is used for evaluating the surge capability of water body and metal dissolubility and the toxicity thereof at water in the water quality, can show whether surface water (river, river, lake, pool, seawater etc.) and underground water are polluted, whether wastewater treatment is up to standard, whether reach emission standard, bicarbonate radical is one of control judge index of basicity in the water quality, for the industrial and agricultural production water provides important scientific basis.

Current classic method to mensuration bicarbonate radical in the water quality is a titrimetry.The operation of this method is cumbersome, complexity, and the cost height, the time is long, level professional technology is required high, causes the bicarbonate radical that detects in the water quality with titrimetry can't penetration and promotion, can't go deep into on-the-spot detection.

The immediate data that adopts titrimetry detection water quality basicity to obtain is the volume (V of the standard acid of consumption _H ⁺), because the difference of employed indicator, terminal point (PH) value is different, the V of the standard acid that is consumed _H ⁺Also different, this moment V _H ⁺Corresponding what calculate is the summation of water neutral and alkali material, different indicator obtains different V _H ⁺Value, thus different basicity calculated, can only estimate bicarbonate radical and carbonate content separately in the water, have only when the chemical composition in the water sample when being known, just can be interpreted as concrete material.

For example get 100 milliliters of water samples in conical flask, add 4 instructions phenolphthalein solutions, shake up, when solution takes on a red color, be titrated to firm fading, write down the used amount V that removes hydrochloric acid standard solution with hydrochloric acid standard solution _H ⁺=P when solution is colourless, adds 3 methyl orange indicator solutions again, shakes up, become salmon pink by orange colour with hydrochloric acid standard solution titration to solution till, record spends hydrochloric acid standard solution V _H ⁺=M, then the total flow of hydrochloric acid standard solution is T=P+M, is divided into five kinds of situation discussion this moment:

1. when M=0, P=T then.

Represent not contain carbonate and bicarbonate radical in the water quality, be bicarbonate radical=0, carbonate=0, the then whole oxyhydroxide of P representative.

2. work as $P>\frac{1}{2}T$ During T, M＞0 is described, contain carbonate and oxyhydroxide in the water this moment.

Carbonate=2M=2 (T-P);

Carbonate basicity is (with CaCO ₃Meter mg/L) $=\frac{c(T-P)\×50.5}{V}\×1000;$ Oxyhydroxide=2P-T.

3. work as $P=\frac{1}{2}T$ , promptly during P=M, have only carbonate in the water this moment, carbonate=2P=2M=T, and carbonate basicity is (with CaCO ₃Meter mg/L) $=\frac{c\·P\×50.05}{V}\×1000,$ Bicarbonate radical=0.

4. work as $P<\frac{1}{2}T$ The time, water quality contains carbonate and bicarbonate radical simultaneously, carbonate=2P, and bicarbonate radical=T-2P, carbonate basicity is (with CaCO ₃Meter mg/L) $=\frac{c\&CenterDot;P\&times;50.05}{V}\&times;1000$ Carbonate hydrogen root basicity is (with CaCO ₃Meter mg/L) $=\frac{c(T-2P)\&times;50.05}{V}\&times;1000.$

5. during P=0, has only bicarbonate radical in the water

Bicarbonate radical=T=M, bicarbonate radical basicity is (with CaCO ₃Meter mg/L) $=\frac{c.M\&times;50.05}{V}\&times;1000$

Need reagent more when adopting titrimetry, (1) phenolphthalein indicator, (2) methyl orange indicator, (3) sodium carbonate standard solution, (4) hydrochloric acid standard solution, (5) no carbon dioxide pure water, palpus is demarcated hydrochloric acid solution earlier before above-mentioned steps is implemented, and the hydrochloric acid solution of preparation of the water of different level of alkalinity palpus and demarcation variable concentrations.In addition, for waste water, sewage because the composition complexity, is not only to contain carbonate merely, bicarbonate radical and oxyhydroxide, and other alkaline matter wherein, the same and acid of materials such as hydrolysis salt is worked.Thereby can't adopt titrimetry to detect.

Adopt the titration measuring bicarbonate radical to also have another shortcoming to be, disturbing factor is many, and every meta-alkalescence material is all influential to testing result, can make also interference measurement of oxidation-reduction quality material that indicator fades.And each the detection all gets preparation demarcation standard solution again.

(3) utility model content: the purpose of this utility model is: use lambert's one Beer law, adopt colorimetric detection, make bicarbonate radical colorimetric fast measuring pipe in the water quality.

The technical solution of the utility model is: bicarbonate radical colorimetric fast measuring pipe in a kind of water quality, comprise the uniform cross section 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 that detects bicarbonate radical is housed in the pipe, measures the height H of liquid ₁With the uniform cross section pipeline section H that leaves a blank ₂Ratio be H ₁: H ₂Equal 1: (4～6).

Measure in the liquid and contain 1% triphenylmethane acidic dye, 1.5% phosphate, water, the ratio of three's volume is (3～5): (1～2): (4～6).

Phosphate can be trbasic zinc phosphate, or is sodium hydrogen phosphate, or is potassium dihydrogen phosphate, and water can be distilled water, or is deionized water, or is molecule membrane filtration water.

The good effect that the utility model is useful:

(1) colorimetric analysis is measured and at first will be made the standard color range, and the color extended immobilization prepares and demarcate standard solution again when need not to analyze at every turn, save time, and reduces labor intensity greatly.

(2) the detection technique commercialization, normalization will be measured liquid and prepare in advance, seal up for safekeeping in glass tube with vacuum, can preserve for a long time, simplify greatly and detect step, shorten detection time greatly.

(3) chromogenic reaction of mensuration liquid and determinand bicarbonate radical is a characteristic reaction, carries out in glass tube with vacuum, and noiseless, testing result accurately and reliably.

(4) in water sample to be measured, fracture and measure the pipe kapillary, water sample injects automatically measures the reaction of Guan Bingyu pipe mensuration liquid, after treating colour stable, direct and standard color range contrasts, carbon acid radical content with the immediate colour code representative of standard color range color, be and measure contained bicarbonate root in the water sample, measure simple and direct quick.

(5) the mensuration precision of bicarbonate radical colorimetric fast measuring pipe meets the water analysis error requirements.Titrimetry and colorimetric rapid test method data of the present invention compare:

(4) description of drawings:

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

(5) specific embodiment:

Implement bicarbonate radical colorimetric fast measuring pipe in the water quality, at first to make a series of bicarbonate radical different contents or claim variable concentrations standard charomatron, form a series of standard color range color development system, and color fixed, make it colour-fast, charomatron makes its colour developing accurately by spectrophotometer adjustment and demarcation.

Embodiment one, and referring to Fig. 1, among the figure, 1 is uniform cross section mensuration pipe, and 2 is capillary tube segment, and 3 for detecting bicarbonate radical mensuration liquid, and it highly is H ₁, the uniform cross section pipeline section section of leaving a blank, it highly is H ₂In the present embodiment, 1% triphenylmethane acidic dye is got 30 milliliters, 10 milliliters of 1.5% trbasic zinc phosphates, 40 milliliters of distilled waters are mixed with 80 milliliters and measure liquid, measure the pipe physical dimension to be: uniform cross section external diameter 7.5mm, overall height is 10cm, and the kapillary height is 2.0cm, measures the liquid and the height H of leaving a blank ₁: H ₂Be 1: 4, measure height H ₁Be 1.6cm, the height H of leaving a blank ₂Be 6.4cm.

Embodiment two, the mensuration tubular construction of present embodiment is with the same meaning of embodiment one identical numbering representative, do not repeat, have be: 1% triphenylmethane acidic dye is got 40 milliliters, and 1.5% trbasic zinc phosphate is got 15 milliliters, and deionized water is got 50 milliliters, be made into 105 milliliters and measure liquid, the physical dimension of measuring pipe is measured liquid and the height of leaving a blank, H with embodiment one ₁: H ₂=1: 5, H ₁Be 1.33cm, H ₂Be 6.67cm.

Embodiment three: the mensuration pipe of present embodiment is with embodiment one, and the same meaning of identical numbering representative does not repeat.Measure the pipe physical dimension with embodiment one.Get 50 milliliters of 1% triphenylmethane acidic dyes in the present embodiment, 20 milliliters of trbasic zinc phosphates, 60 milliliters of distilled waters are made into 130 milliliters and measure liquid, measure the pipe physical dimension with embodiment one, H ₁: H ₂Be 1: 6, H then ₁Be 1.14cm, H ₂Be 6.86cm.

Claims (3)

1. bicarbonate radical colorimetric fast measuring pipe in the water quality, comprise the uniform cross section 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 that detects bicarbonate radical is housed in the pipe, measure the height H of liquid ₁With the uniform cross section pipeline section H that leaves a blank ₂Ratio be H ₁: H ₂Equal 1: (4～6).

2. mensuration pipe according to claim 1 is characterized in that: measures in the liquid and contains 1% triphenylmethane acidic dye, and 1.5% phosphate, water, the ratio of three's volume is (3～5): (1～2): (4～6).

3. mensuration pipe according to claim 1 and 2, it is characterized in that: phosphate can be trbasic zinc phosphate, or is sodium hydrogen phosphate, or is potassium dihydrogen phosphate, and water can be distilled water, or is deionized water, or is molecule membrane filtration water.