Precise Measurement of Chlorine Isotopes Based on Cs<sub>2</sub>Cl<sup>2</sup>by Thermal Ionization Mass Spectrometry

Zhou, Yuanyuan; Liu, W. G.

doi:10.1080/00032719508000346

Cited by 38 publications

(16 citation statements)

References 5 publications

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“…The ion current intensity obtained in this study (2-3 × 10 -13 A, 2 µg-Cl loaded) was much lower than the intensity reported by Xiao et al (1995) (7 × 10 -12 A, 10 µg-Cl loaded), but higher than the value reported by Magenheim et al (1994) (4 × 10 -14 A, 2 µg-Cl loaded). The Cl isotopic ratio of seawater measured in this study was 0.319794 ± 0.000051 (average of run 1-25 ± 1σ SD ).…”

Section: Comparison Of Mass Spectrometric Methodscontrasting

confidence: 51%

“…Although Cl in seawater is isotopically homogeneous with variations less than the analytical precision, it is possible that the analytical methods could be improved to detect these variations (Xiao et al, 1995). In the case of mass spectrometry of CH 3 Cl, reference CH 3 Cl gas is introduced into the spectrometer, and ion beams are measured alternately in the sample and the reference for precise relative measurement (Long et al, 1993;Musashi et al, 1998).…”

Section: Cscl Reagentsmentioning

confidence: 99%

“…The mass spectrometric procedure was the modified method of Xiao and Zhang (1992), Magenheim et al (1994), and Xiao et al (1995). Two micrograms of chlorine as CsCl aqueous solution (9.5 g-CsCl/l × 1.0 µl) and ca.…”

Section: Mass Spectrometrymentioning

confidence: 99%

“…Thermal ionization mass spectroscopy (TIMS) of Cs 2 Cl + has small mass dependent fractionation, high sensitivity and low filament blank (Xiao and Zhang, 1992;Magenheim et al, 1994;Xiao et al, 1995;Rosenbaum et al, 2000). It has been used successfully in the investigation of brines (Liu et al, 1997), aerosols (Magenheim et al, 1994;Volpe and Spivack, 1994;Volpe et al, 1998), rocks (Magenheim et al, 1994;Magenheim et al, 1995;Boudreau et al, 1997;Banks et al, 2000), and subduction-zone pore waters (Ransom et al, 1995) in magnetic scanning (peak jumping) mode.…”

Section: Introductionmentioning

confidence: 99%

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Precise measurement of chlorine stable isotopic ratios by thermal ionization mass spectrometry.

2001

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An improved method for chlorine isotopic analysis by thermal ionization mass spectrometry of Cs 2 Cl + has been investigated for precise measurement of 37 Cl/ 35 Cl isotopic ratios for small amount of samples. Chlorine in organic and inorganic samples was recovered as AgCl and converted to CsCl with metallic Mg and Cs-form ion exchange resin. The CsCl (containing 2 µg of Cl) was loaded on a Ta filament together with graphite powder. The 37 Cl/ 35 Cl ratio measurement was carried out using Cs 2 Cl + ions with multi Faraday cup (static mode) for 80-100 min each single run. Replicate analysis of ocean water and laboratory standard (CsCl reagent) yield the in-run precision of 0.1-0.2‰ (2σ m ) for 300-400 ratios and external precision of 0.1-0.2‰ (1σ SD ). This method has been tested on a variety of chemical reagents including metal chlorides, hydrochloric acid and chlorinated organic solvents. It was found that the artificial chlorine compound show large variations of 37 Cl/ 35 Cl ratio (total ranges from -5 to +3‰ relative to standard mean ocean chloride) depending upon manufacturing processes. We suggest that the high sensitivity and precision technique established in this work would allow us to detect small isotopic variations of chlorine in small amounts of natural samples such as terrestrial materials (minerals/rocks, sediments, groundwater, etc, as well as environmental materials), meteorites and other planetary materials.

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Section: Comparison Of Mass Spectrometric Methodscontrasting

confidence: 51%

Section: Cscl Reagentsmentioning

confidence: 99%

Section: Mass Spectrometrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Precise measurement of chlorine stable isotopic ratios by thermal ionization mass spectrometry.

2001

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“…The CsCl solution was then used for the mass spectrometry analysis. The mass spectrometry analysis is basically the same as that reported by Xiao and Zhang (1992); Xiao et al (1995) and Vengosh et al (1989): A VG 354 thermal ionization mass spectrometer was used for chlorine isotope measurements. The single tantalum filament heated at a current of 3.0 A for 1 h in a vacuum system, was first treated with a graphite slurry of 3 µL to coat the center of the filament.…”

Section: Sample Collection and Measurementsmentioning

confidence: 96%

Chlorine, sulfur and oxygen isotopic constraints on ancient evaporite deposit in the Western Tarim Basin, China

Tan

Wei

et al. 2006

Geochem. J.

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From the late Cretaceous to the early Tertiary period, the Tethys seawater repeatedly invaded the Shaqa sub-basin and entered the Kuqa sub-basin through the Awati straight. At the same time, as a result of tectonic and paleoenvironmental conditions, many sequences of thick strata of evaporites, especially in its two largest sub-basins of Kuqa in the north and Shaqa in the southwest have been deposited. Therefore, the western Tarim Basin has been considered to be a favorable location to prospect for ancient potash deposits. In order to clearly distinguish between a marine or a continental origin, and also to study the evaporite facies (i.e., late vs. early stage), we analyzed the late stages of evaporites of gypsum and salt minerals and measured chlorine isotope values in halite, sulfur isotopes in gypsum and oxygen isotopes in crystalline water of gypsum. The results showed that the sulfur isotope composition of gypsum can be used to distinguish between a marine and continental origin and chlorine isotopes of salt and oxygen isotopes of crystalline water in gypsum can be used to judge the sedimentary stage. Based on these results, we conclude that the late Cretaceous halite deposited in the Kashi Depression of the southwestern Tarim Basin have a marine origin and represent a later stage of marine evaporite sequence compared to other evaporites in the regions. Hence, the Kashi Depression should be considered as a promising area for finding new sylvinite deposits.

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Effects of ultrafiltration on salt migration and isotopic composition of pore water in groundwater depression area in Hengshui, NCP

Wang

Chen

et al. 2021

Hydrological Processes

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Clay aquitards are semipermeable membranes that allow groundwater flow while retarding solute migration has been researched extensively but also subjected to much debate. At present, there is no evidence of whether the physical and chemical properties of clay soil and the isotopic composition of pore water affect the semipermeable membrane effect. In this study, we collected clay samples from drilling cores (30-90 m) in the Hengshui area located in the North China Plain (NCP), then extracted pore water using a high-pressure squeezing device. Vertical hydrochemical and isotopic profile variation trends for the pore water were revealed using hydrochemical (Cl À , Na + , Ca 2+ , K + , Mg 2+ , and SO 4 2À ) and stable isotopic measurements of H, O and Cl. The results showed that the hydrochemical clay interlayer pore water of the saline aquifer is Cl/SO 4 -Na/Mg type and the average total dissolved solids (TDS) are 10.17 g/L. However, the hydrochemical clay aquitard pore water is

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Precise Measurement of Chlorine Isotopes Based on Cs₂Cl²by Thermal Ionization Mass Spectrometry

Cited by 38 publications

References 5 publications

Precise measurement of chlorine stable isotopic ratios by thermal ionization mass spectrometry.

Precise measurement of chlorine stable isotopic ratios by thermal ionization mass spectrometry.

Chlorine, sulfur and oxygen isotopic constraints on ancient evaporite deposit in the Western Tarim Basin, China

Effects of ultrafiltration on salt migration and isotopic composition of pore water in groundwater depression area in Hengshui, NCP

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Precise Measurement of Chlorine Isotopes Based on Cs2Cl2by Thermal Ionization Mass Spectrometry

Cited by 38 publications

References 5 publications

Precise measurement of chlorine stable isotopic ratios by thermal ionization mass spectrometry.

Precise measurement of chlorine stable isotopic ratios by thermal ionization mass spectrometry.

Chlorine, sulfur and oxygen isotopic constraints on ancient evaporite deposit in the Western Tarim Basin, China

Effects of ultrafiltration on salt migration and isotopic composition of pore water in groundwater depression area in Hengshui, NCP

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Precise Measurement of Chlorine Isotopes Based on Cs₂Cl²by Thermal Ionization Mass Spectrometry