CN203837953U - Volatile organic water sample one-time depthkeeping normal-position sampling bottle - Google Patents

Abstract

The utility model discloses a volatile organic water sample one-time depthkeeping normal-position sampling bottle. The bottle comprises a screwing cover on the bottle body, wherein the covering surface of the screwing cover is a permanent magnet covering surface, the screwing cover extends to form a tubular body in the axial direction, the pipe wall of the tubular body is provided with a water inlet hole, a magnetic cushion is assembled in the tubular body, and a rubber cushion is embedded in the magnetic cushion. In a sampling process, a water sample does not make contact with the external system and water bodies in other layers and is placed in a single bottle, the water sample is further prevented from making contact with a sampling barrel in a sampling process and naturally flows into the sampling bottle in an original system under the negative-pressure-free circumstance, volatile component loss is reduced to the maximum, physical and chemical property changes and cross contamination of volatile components are avoided, depthkeeping normal-position sampling of the standard volatile organic sample bottle is achieved, and the sample is insulated from the outside in sampling and inspecting processes and can be in direct butt joint with a laboratory sampling needle through a polytetrafluoroetylene flexible rubble cushion in a laboratory analysis process. The sampling bottle is used in a disposable mode, cross contamination is prevented, and possibility of loss of the volatile components and cross contamination is reduced to the minimum.

Description

The disposable depthkeeping in-situ sampling of the organic water sample of volatility bottle

Technical field

The present invention relates to sampling apparatus, relate in particular to sampling jar.

Background technology

Analyzing data is reliably basic guarantee of accurate evaluation water quality condition and pollution level, and sample collection process is the most important link of impact analysis data reliability, different water sampling methods can cause in various degree and disturb various analysis components, especially organic component volatilizees, in water body environment, extensive existence and content are very low, belong to trace analysis category, as easy as rolling off a log changing.At present, in water quality standard for drinking water, regulation volatile organic constituents Cmax mostly is several to tens micrograms per litre both at home and abroad, and laboratory volatile organic constituents detection limit mostly is several micrograms per litre at zero point, even lower, while needing only water sampling, error all likely changes the actual concentration of volatile organic constituents in water sample slightly.Thereby the acquisition technique of organic analysis water sample requires should be apparently higher than the acquisition technique requirement of conventional component analysis water sample.

External Groundwater Contamination Investigation appraisal starts early, and its sampling technique also becomes better and approaching perfection day by day, and advanced underground water water sample harvester has sampling pump, bucket sampler, directly advances and descend water sampling technology etc. in situ at present.With regard to prior art, sampling pump Shortcomings, as peristaltic pump needs power-equipment to assist, have head space phenomenon to exist in sampling process, be unfavorable for that maintenance, its material of volatile components may cause water sample to be subject to the Organic Pollutions such as phthalate, air pocket pump need pressure gas and control device, dismounting and purification consuming time longer; Bucket sampler has cannot reduce volatile components loss, easily cause the deficiencies such as cross pollution, in addition due to capacity limitation, need to repeatedly sample and could meet sampling requirement.Domestic to the research of underground water sampling method still in the starting stage, except selecting external sampler, substantially by drawing water sampling or pour water with the sampling equipment that simple and easy gravity enters water, surface water groundwater makes sampler as disclosed in ZL200720100866.5 adopts assembles 3 sampling jars in collection tube, wherein large sampling bottle is assemblied in collection tube bottom, internal control card lower end is coordinated with sampling bottle Contact so that sampling bottle position is fixed, in two other little sampling bottle, be assemblied on clip.While gathering water sample, to under sampler, arrive under water, when thief rod length is inadequate, can dock its prolongation by the bolt of its end, when collection tube reaches under water predetermined depth, between sensor and solenoid valve, be electrically connected to and complete by the autocontrol switch on power supply the mechanical action of solenoid valve, water sample enters in collection tube along cylinder end water inlet successively, when water level is during higher than inlet opening, water sample overflow enters large collecting bottle, and then overflow enters little collecting bottle, on after collection completes, carry thief rod, now sensor touches and makes closed electromagnetic valve, sampler is proposed, tighten sampling bottle cap under water, sampling process completes.Although this sampler has realized depthkeeping in-situ sampling, in sampling process, sample and ambient atmosphere are short duration of contact, have reduced the extent of damage and the cross pollution of sampling process volatile constituent.Yet, this sampler is when water sample contacts with ambient systems, sampling process sample need to flow through sampler barrel, cover sampling jar, may cause cross pollution, in addition, there is aeration and turbulent flow in sampling process, especially for gathering pollution water sample, can cause sampler to pollute, clean difficulty, may cause other water sample to pollute, thereby be difficult to meet depthkeeping sampling and keep metastable requirement in each component sampling process of former water sample.

Summary of the invention

The invention provides the disposable sampling jar of a kind of volatility organic sample, the drawback existing to overcome prior art.

For realizing the object of the invention, the disposable sampling jar of this volatility organic sample comprises the spiral cover being assemblied on bottle, on spiral cover capping, offer thief hole, it is characterized in that described spiral cover capping is permanent magnet capping, described spiral cover extends axially out a tubular body, in tubular body wall, offer inlet opening, in tubular body, assemble the magnetic conduction pad that footpath is always greater than thief hole aperture, setting-in colloid pad on magnetic conduction pad.

Place, described magnetic conduction pad axle center extends axially out a column, and the height of described column is less than the height of tubular body.

Described magnetic conduction pad is coated with gelatinous layer, and this gelatinous layer is preferably selected Teflon material.

The technical progress that the present invention obtains: owing to adopting the sampling jar of structure of the present invention, at the scene in sampling process, after the electromagnet that sampling jar arranges in being installed in collection tube triggers, under electromagnetic action magnetic conduction pad overcome and permanent magnet capping between magnetic force after axially move up, the inlet opening of water sample in tubular body wall flows into sampling jar, water sample is filled electromagnet power-off after sampling jar, magnetic conduction pad forms again under self gravitation and magneticaction and between permanent magnet capping that after close contact has sampled, to sample bottleneck automatically closed in position, can complete the disposable sampling of 40ml standard sampling jar, there is not any contact with ambient systems in water sample in sampling process, do not contact with other layer of position water sample, single bottle enters water, sampling process has also avoided water sample to contact with sample bucket, water sample is without under negative pressure condition, under original system condition, naturally flow in sampling jar, pressure, temperature, oxidation-reduction potential, the physicochemical environment factors such as pH value do not change, reduced to greatest extent the loss that volatile constituent causes in sampling process, simultaneously, volatility pollution components physicochemical property and state variation have been avoided, avoided cross pollution.

The present invention by bottle directly into water, original system gathers water sample, has effectively avoided contacting with different layers position water body and unlike material sampler with ambient systems in sampling process, and sampling process is without negative pressure, water sample flows into sampling jar naturally, greatly reduces the influence factors such as slight aeration and turbulent flow.Realized from being sampled to laboratory sample and having tested whole process, sample does not contact with any ambient systems, and meanwhile, the disposable use of sampling jar, can not cause cross pollution, and volatile constituent loss and cross pollution possibility have been dropped to minimum.

The present invention has realized the sampling of standard volatility organic sample bottle depthkeeping original system, sampling process can keep original system condition, be sampling jar on put forward process, censorship process, connect in sample process and storage process, sample is all in the state of being hedged off from the outer world, until during lab analysis, fluorine dragon maltha pad by setting-in on magnetic conductivity pad, can be directly with laboratory sampling for connecing, realized sample from original system to lab analysis overall process with extraneous effective completely cutting off.

Accompanying drawing explanation

Fig. 1 is one-piece construction schematic diagram of the present invention.

Embodiment

As shown in Figure 1, the disposable sampling jar of volatility organic sample of the present invention is the improvement that existing volatility organic sample 40ml standard sampling jar is carried out, it comprises the spiral cover 3 being assemblied on bottle 1, on spiral cover capping 4, offer thief hole 8, spiral cover capping 4 is permanent magnet capping, spiral cover 3 extends axially out a tubular body 6, on tubular body 6 tube walls, offer inlet opening 5, the interior assembling of tubular body 6 always footpath is greater than the magnetic conduction pad 10 in thief hole 11 apertures, magnetic conduction pad 10 is coated with Teflon gelatinous layer, setting-in Teflon colloid pad 2 in the aperture of offering on magnetic conduction pad 10, the place, axle center of magnetic conduction pad 10 axially extends upward a column 9, the height of this column 9 is less than the height of tubular body 6, on tubular body 6, also offer vent port 8, the upper position of corresponding column 9 is equiped with calutron 7, 7 clampings of tubular body 6 and calutron or spin, calutron 7 can make after electric the magnetic conduction pad 10 that is connected with column 9 interior along moving on its axis at tubular body 6, make to communicate with water body in the thief hole 11 of bottle 1 under water, water sample enters bottle 1 via inlet opening 5 from thief hole 11, simultaneously through vent port 8 exhausts, water sample is filled with the rear calutron power-off of bottle 1, magnetic conduction pad and coupled column 9 lower backwardness again and 4 formation close contacts of permanent magnet capping under self gravitation and magneticaction, sampled rear sampling bottleneck automatically closed in position, thereby complete the disposable sampling process of 40ml standard sampling jar.Calutron 7 tops installing sampling cables, cable can load-bearing and is labeled with scale.

By different sampling modes, the various influence factor researchs to volatile constituent in volatile constituent influence degree and sampling process are shown: adopt respectively the present invention, bucket sampler and the three kinds of samplers of peristaltic pump be installed in depthkeeping in-situ sampler three groups of underground water samples of section parallel acquisition at one time,-4 ℃ keep in Dark Place, after censorship on the same day, carry out contrast test, ALS laboratory, organic analysis sample censorship Hong Kong, analyzes 160 of organic contamination components.

In same time section, same sampling spot, same operating personnel, in the situation that can not separating out the potential pollution source of target stains material, operating process exists, in above-mentioned different sampler collection water sample, the volatile organic constituents value of detecting is less, and the loss that sign the method causes volatile constituent in sample collection process is larger.Respectively detecting the peaked sample of certain volatile organic constituents, be considered as this sample loss is zero to this component in gatherer process, utilize following formula (1) to calculate the relative loss degree of above-mentioned three kinds of samplers to different volatile organic contaminants in sample collection process, and utilize following formula (2) to calculate the average loss degree to volatile organic contaminant in every kind of sampling method sample collection process, its volatile organic constituents detects shown in situation and average extent of damage result table 1.

………………（1）

…………………………（2）

Wherein:

: the relative loss degree of sampler i to volatile organic contaminant j in sample collection process.

: the Cmax that adopts the volatile organic contaminant j that three kinds of samplers detect.

: the concentration of the volatile organic contaminant j that the sample that adopts sampler i to gather detects.

: the average loss degree of sampler i to volatile organic contaminant in sample collection process.

: sampler i detects organic contamination component quantity.

table 1 volatile organic constituents extent of damage table (%)

Sampling equipment	Cis-1,2-dichloroethene	Triclene	Zellon	Mean value
					Water-sample automatic in-situ acquisition and analysis instrument	0.00	0.00	0.00	0.00
Bucket sampler	9.57	0.00	7.69	5.76
					Peristaltic pump	34.12	45.45	50.00	43.19

Every organic contamination component maximal value that detects of take is benchmark, depthkeeping in-situ sampler, bucket sampler and peristaltic pump are respectively 0%, 5.76% and 43.19% to the average loss degree of volatile organic contaminant, obviously, adopt the sample test results of the present invention being installed in depthkeeping in-situ sampler in the water sample collection work that obtains volatility organic contamination component concentration, to be better than bucket sampler and peristaltic pump.

By sampling theorem, analyze, think in sampling process in the negative pressure of the volatile organic constituents extent of damage, aeration and three kinds of influence factors of turbulent flow, negative pressure has the greatest impact, easily cause volatile organic constituents to overflow, the impact that slight aeration and turbulent flow are overflowed on volatile constituent, well below negative pressure, wherein the impact of turbulent flow is lower than aeration.

By Delta of the Pearl River Groundwater Contamination Investigation assessment item sample collection, and extend to the application of Chinese Geological environmental monitoring Yuan He Guangdong Province geologic examination Yuan Deng unit, collected specimens is nearly ten thousand groups, has verified its stability; By the peristaltic pump with advanced in the industry and bucket sampler sampling contrast experiment, verified the superiority (in Table 2) of the present invention in volatile organic contaminant sample collection process.

The different sampling method organic contaminants of table 2 detect situation (μ g/L)

Sampling equipment	Cis-1,2-dichloroethene	Triclene	Zellon
				Depthkeeping in-situ sampler	9.4	1.1	1.3
Bucket sampler	8.5	1.1	1.2
				Peristaltic pump	5.6	0.6	0.6

Claims (3)

1. the disposable depthkeeping in-situ sampling of the organic water sample of a volatility bottle, it comprises the spiral cover being assemblied on bottle, on spiral cover capping, offer thief hole, it is characterized in that described spiral cover capping is permanent magnet capping, described spiral cover extends axially out a tubular body, in tubular body wall, offer inlet opening, in tubular body, assemble the magnetic conduction pad that footpath is always greater than thief hole aperture, setting-in colloid pad on magnetic conductivity pad.

2. the disposable depthkeeping in-situ sampling of the organic water sample of volatility according to claim 1 bottle, is characterized in that place, described magnetic conduction pad axle center extends axially out a column, and the height of described column is less than the height of tubular body.

3. the disposable depthkeeping in-situ sampling of the organic water sample of volatility according to claim 1 and 2 bottle, is characterized in that described magnetic conduction pad is coated with gelatinous layer.