Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

DGT/LA-ICP-MS based analysis method of sediment void water metal element micro-area distribution

A LA-ICP-MS, metal element technology, applied in the field of environmental micro-area analysis, can solve the problems of low precision and accuracy, small analysis image area, and high difficulty in operation, to improve precision and accuracy, and analysis cost. Low, fast erosion effect

Inactive Publication Date: 2016-05-25
CHINESE RES ACAD OF ENVIRONMENTAL SCI
View PDF0 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the defects of DGT / LA-ICP-MS in the prior art, such as high difficulty in operation, cumbersome processing, low precision and accuracy, slow analysis speed, and small analysis image area. , so as to provide a simple and reliable operation, high precision and accuracy, fast analysis speed, large analysis image area (> 8cm 2 ), good detection effect based on the DGT / LA-ICP-MS analysis method for the micro-area distribution of metal elements in sediment pore water

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • DGT/LA-ICP-MS based analysis method of sediment void water metal element micro-area distribution
  • DGT/LA-ICP-MS based analysis method of sediment void water metal element micro-area distribution
  • DGT/LA-ICP-MS based analysis method of sediment void water metal element micro-area distribution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The present invention is based on DGT / LA-ICP-MS the analysis method of the micro-area distribution of metal elements (taking iron as an example) as follows:

[0043] 1. Internal standard 115 In fixative

[0044] 1.1 Preprocessing method of SPR-IDADGT

[0045] The circular SPR-IDADGT is used for the test in the standard solution, and its window diameter is 1.8cm; the size of the frame window of the DGT probe is: 1.8×15cm.

[0046] The DGT sampler consists of a filter membrane (0.45μm pore size, 0.13mm thickness); a diffusion gel (APA2 type, 5nm pore size, ≤0.40mm thickness) and a fixed gel (SPR-IDA type, 0.40mm thickness), composed of DGT Courtesy of Research Corporation (Lancaster University, UK). For its preparation method, refer to the literature (Warnkene et al., 2004; Scally et al., 2006).

[0047] The resin particle size of the Chelex-100 fixative used in conventional DGT analysis is too large to meet the needs of submillimeter-level chemical images; therefore,...

Embodiment 2

[0083] 1. Carry out the chemical image determination of the iron element of the sediment DGT probe at the sediment / water interface by the method of Example 1 (measurement location: Dianchi Lake)

[0084] In the area with high iron content (>3000mg / kg) in the surface sediments in the east of Dianchi Lake, a columnar sediment sample was collected with a PVC pipe, and the deaerated 115 Two DGT probes (II and III) of the In internal standard element are put back-to-back in the sediment columnar sample, measure 48 hours, take out two probes, a probe (II) according to " 3.DGT in embodiment 1 Operation of the probe in the sediment and subsequent processing method” to operate, this eluent—DGT probe (II) and internal standard 115 The DGT probe (I) eluate concentration of In was transformed into M / A value, the precision RSD=2.7% of M / A value (n=22), showed 115 The In internal standard element is evenly distributed on the SRP-IDA gel of the DGT probe, and, 115 The exchange of In with m...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a DGT / LA-ICP-MS based analysis method of sediment void water metal element micro-area distribution. The method comprises the steps that an internal standard 115In element is fixed to DGT; then fixing glue acting on 115In plays action in a metal standard solution to be tested to get standard to-be-tested metal element fixing glue; LA-ICP-MS analysis is conducted on the standard to-be-tested metal element fixing glue to make a DGT-standard to-be-tested metal element curve; then the DGT probe to which the internal standard 115In is fixed is put into a sediment for testing, the LA-ICP-MS analysis is performed, and a DGT-to-be-tested metal image is drawn. A DGT fixing glue internal standard 115In treatment method is simple, the LA-ICP-MS analysis is conducted by using the single-layer fixing glue, the analysis precision and accuracy are improved, multiple metal elements can be analyzed simultaneously, and the high-quality metal element chemistry image can be obtained.

Description

technical field [0001] The invention relates to the technical field of environmental micro-area analysis, in particular to a DGT / LA-ICP-MS-based analysis method for micro-area distribution of metal elements in sediment pore water. Background technique [0002] Lake sediments store a large amount of organic matter, nutrients and redox-sensitive elements, and the above-mentioned substances have undergone strong remineralization and biogeochemical processes in the sediments. The microenvironment of sediments is generally small-scale (from 5 μm to 1.9 mm), and its three-dimensional geochemical behavior is significantly different compared with that at the same depth. It may be a hole, root, bioturbation, benthic activity, or localized microbial processes with significantly higher (or lower) biogeochemical reaction rates than the surrounding sediment (Stockdale, A.; Davison, W.; Zhang, H. Micro-scale biogeochemical heterogeneity insediments: Review of available technology and obs...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62
CPCG01N27/628
Inventor 王圣瑞吴志皓倪兆奎赵海超焦立新
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com