CN2720448Y

CN2720448Y - Micro multifunctional sample-feeding device

Info

Publication number: CN2720448Y
Application number: CN 200420084256
Authority: CN
Inventors: 龚治湘
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-07-27
Filing date: 2004-07-27
Publication date: 2005-08-24
Anticipated expiration: 2014-07-27

Abstract

The utility model relates to a micro multifunctional sample-feeding device provided with double capillaries, and the lower ends of the double capillaries are respectively inserted into a container. The containers are respectively provided with a test solution and a reagent. The upper ends of the capillaries are built into capillaries and crookedly extend into the cavity of the gas-liquid segregator. The upper part of the segregator is provided with a gas outlet, the bottom part of the segregator is provided with a waste fluid outlet, and the outside of the lower part of the segregator is provided with an argon inlet. The double capillaries respectively suck the test solution and the reagent when using it. The strong reducer KBH4 is put into the reagent and contacts with the test solution to generate the chemical reaction and the covalent compound. The covalent compound is introduced into the flame and an electric heating quartz capsule can measure different kinds of microelements, which is easy, fast and practical.

Description

The miniature multi-function sampling device

Technical field

The utility model relates to a kind of miniature multi-function sampling device, be that a cover double capillary is connected in NITRATE BY FLAME ATOMIC absorption (FAAS) sample introduction end, add the physicochemical property that entry or reagent change test solution by online, realize the purpose of detection, simultaneously can connect gas-liquid separator, T type quartz ampoule or quartzy stove carry out hydrogenation AAS or atomic fluorescence (AFS) is analyzed with being brought into by the carrier gas argon after the fluid separation applications of hydrogenation, belong to detect apparatus

Technical field.

Background technology

In the analytical test field, there are some problems in atom A AS and AFS.AAS can not measure the high-load composition, if artificial dilution for many times solution easily produces dilution error, therefore often needs with loaded down with trivial details chemical method.Occurred the automatic dilution device in recent years abroad, but its cost is higher and detection speed is slow, therefore presses in bigger concentration range and measure high content component with fast method.

Air acetylene flame AAS has handy and safe and cheap advantage, but the elements such as chromium, tin, arsenic, antimony, bismuth, mercury and Se of low content are difficult to measure, and it is very low to measure plumbous sensitivity.Therefore the sample of measuring low content is difficulty, adds the lanthanum (La) of 1mg/ml in addition in test solution for the mensuration length of calcium, magnesium, and mensuration potassium, sodium often add rubidium (Rb) or caesium (Cs) salt of 1mg/ml, but wherein 99% outwells and cause waste in company with waste liquid.

Summary of the invention

The purpose of this utility model is that a kind of miniature multi-function sampling device will be provided, it adopts double capillary to be connected in the sample introduction end of instrument or connects atomizer through after the gas-liquid separation, it can overcome above-mentioned shortcoming, and its structure miniization and can save analyzing and testing time and high purity reagent in a large number, reduce disturbing effect and enlarged the kind and the concentration range of tested element.

The structure of miniature multi-function sampling device is that insert in the container 11 and 12 lower end of double capillary 1,2, in the container 11 test solution is housed, and container 12 is equipped with KBH ₄Reagent, upper end capillaceous is combined into kapillary 3 and crooked stretching in the inner chamber of gas-liquid separator 7, separation vessel 7 upper ends are crooked and to side stretching, extension formation gas vent 9, the outside, bottom has argon gas inlet port 8, separation vessel 7 lower end diameter to attenuate and forms a waste liquid delivery outlet 10.

The advantage of miniature multi-function sampling device is that this device is microminiaturized, and reaction compartment is minimum and transport path short, has multiple function in FAAS, and velocity of separation is fast in HGAAS or HGAFS, and detectability reaches 10 ^-10, and the consumption of argon gas can reduce 90% when test, and KBH ₄The strong reductant consumption also reduces 2/3 to 90%, basically there is not memory effect, disturb allowance to increase 5～200 times, can reduce more than 1/2 analysis time, the double capillary of this device is exactly a generator, its size have only penholder 1/2 and quality has only several grams, can directly introduce flame, fast measuring As, sb, Bi, Hg, Se, Sn and Pb, its sensitivity can improve 1～2 order of magnitude, can be used for measuring As, sp, Bi, Hg, Sn and Pb in ore deposit rock, metal and the alloy cell, also can be used among the AFS, detectability reaches 10 ^-10～10 ^-11

Description of drawings

Fig. 1. double capillary combination synoptic diagram

Fig. 2. miniature multi-function sampling device synoptic diagram

By Fig. 1, insert in the container 11 and 12 lower end of double capillary 1,2, in the container 11 test solution is housed, container 12 is equipped with water or reagent, the upper end of double capillary 1,2 is combined into kapillary 3 and is contained in the porch of atomizer 4, air inlet port 5 is arranged at the top of atomizer 4, and upper right quarter has impact bead 6, and it is by the bracing frame support.

By Fig. 2, insert in the container 11 and 12 lower end of double capillary 1,2, in the container 11 test solution is housed, and container 12 is equipped with KBH ₄Reagent, upper end capillaceous is combined into kapillary 3 and crooked stretching in the inner chamber of gas-liquid separator 7, separation vessel 7 upper ends are crooked and to side stretching, extension formation gas vent 9, the outside, bottom has argon gas inlet port 8, separation vessel 7 lower end diameter to attenuate and forms a waste liquid delivery outlet 12.

Embodiment

In the structure of Fig. 1, the caliber difference of double capillary 1,2, simultaneously can suck two kinds of liquid, instantaneous mixing mutually in entering atomizer 4, at this moment many reagent that should add in the test solution can online adding in the several seconds of measuring, not only saved the time, the analyzing and testing function is increased, because the difference of caliber, its soakage is also different, therefore extension rate is also different, if cooperate a small amount of claim sample and suitable pre-dilution, just can measure 60% copper, if mix automatic constant positioner, just can guarantee enough transfusion precision, also not have dilution error.If adding inhibitor in test solution disturbs or chemical interference effect to suppress ionization, at this moment only in the several seconds, just suck the reagent of minute quantity, measure the amount of reagent of a sample at ordinary times, can measure the sample more than 100 this moment, save reagent more than 99%, it is too low for example to have solved the sensitivity of measuring chromium when measuring chromium, three problems of the narrow and chemical interference of the range of linearity.

In Fig. 2, test solution flows in the inner chamber of separation vessel 7 through kapillary 3, by the inflow entrance 8 inflow argon gas (Ar) in the outside, its underpart, because online suction strong reductant KBH ₄, when it contacts with the test solution that contains As, sb, Bi, Hg, Se, Sn and Pb, strong chemical reaction takes place and generate the covalency compound, be introduced in flame or the electrothermal quartz tube, can measure trace elements such as As, sb, Bi, Hg, Se, Sn and Pb.Gas all flows out from delivery outlet 9, and waste liquid all flows out from the waste liquid flow export 10 of bottom, and this device can enlarge the range of application of atomic absorption (AAS) effectively in sum.

Claims

1. a miniature multi-function sampling device is characterized in that the lower end of double capillary (1,2) is inserted in the container (11) and (12), and container is equipped with test solution in (11), and container (12) is equipped with KBH ₄Reagent, upper end capillaceous is combined into kapillary (3) and bending is stretched in the inner chamber of gas-liquid separator (7), separation vessel (7) upper end is crooked and stretch to a side and to form gas vent (9), the outside, bottom has argon gas inlet port (8), separation vessel (7) lower end diameter to attenuate and forms a waste liquid delivery outlet (10).