Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Precipitation of Ions03:11

Precipitation of Ions

30.0K
Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
30.0K
Precipitation and Co-precipitation01:17

Precipitation and Co-precipitation

4.1K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
4.1K
Precipitation Reactions03:10

Precipitation Reactions

64.3K
In a precipitation reaction, aqueous solutions of soluble salts react to give an insoluble ionic compound – the precipitate. The reaction occurs when oppositely charged ions in solution overcome their attraction for water and bind to each other, forming a precipitate that separates out from the solution. Since such reactions involve the exchange of ions between ionic compounds in aqueous solution, they are also referred to as double displacement, double replacement, exchange reactions, or...
64.3K
Precipitation Processes01:12

Precipitation Processes

5.8K
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
5.8K
Precipitation Gravimetry01:03

Precipitation Gravimetry

15.0K
Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
15.0K
Colloidal precipitates01:09

Colloidal precipitates

5.9K
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
5.9K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

TRITIUM, HYDROGEN AND OXYGEN ISOTOPE COMPOSITIONS IN MONTHLY PRECIPITATION SAMPLES COLLECTED AT TOKI, JAPAN.

Radiation protection dosimetry·2019
Same author

FWT and OBT concentrations in pine needle samples collected at Toki, Japan (1998-2012).

Radiation protection dosimetry·2015
Same author

An atomically controlled Si film formation process at low temperatures using atmospheric-pressure VHF plasma.

Journal of physics. Condensed matter : an Institute of Physics journal·2011
Same author

[Current problems in the diagnosis of malignant pleural mesothelioma].

Kyobu geka. The Japanese journal of thoracic surgery·2007
Same author

[Evaluation of postoperative pain relief by infiltration of bupivacaine or epidural block after laparoscopic cholecystectomy].

Masui. The Japanese journal of anesthesiology·2002
Same author

Absence of microsatellite instability and germline mutations of E-cadherin, APC and p53 genes in Japanese familial gastric cancer.

Tumour biology : the journal of the International Society for Oncodevelopmental Biology and Medicine·2001

Related Experiment Video

Updated: Jan 22, 2026

IgY Technology: Extraction of Chicken Antibodies from Egg Yolk by Polyethylene Glycol PEG Precipitation
07:26

IgY Technology: Extraction of Chicken Antibodies from Egg Yolk by Polyethylene Glycol PEG Precipitation

Published on: May 1, 2011

65.6K

RECENT TRITIUM CONCENTRATION OF MONTHLY PRECIPITATION IN JAPAN.

S Nakasone1, A Ishimine1, Y Ishizu1

  • 1Graduate School of Engineering and Science, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Nakagami-gun, Okinawa, Japan.

Radiation Protection Dosimetry
|June 29, 2019
PubMed
Summary

Tritium concentrations in Japan

More Related Videos

A Modified Precipitation Method to Isolate Urinary Exosomes
05:05

A Modified Precipitation Method to Isolate Urinary Exosomes

Published on: January 16, 2015

18.0K
Microbiologically Induced Calcite Precipitation Mediated by Sporosarcina pasteurii
09:04

Microbiologically Induced Calcite Precipitation Mediated by Sporosarcina pasteurii

Published on: April 16, 2016

22.7K

Related Experiment Videos

Last Updated: Jan 22, 2026

IgY Technology: Extraction of Chicken Antibodies from Egg Yolk by Polyethylene Glycol PEG Precipitation
07:26

IgY Technology: Extraction of Chicken Antibodies from Egg Yolk by Polyethylene Glycol PEG Precipitation

Published on: May 1, 2011

65.6K
A Modified Precipitation Method to Isolate Urinary Exosomes
05:05

A Modified Precipitation Method to Isolate Urinary Exosomes

Published on: January 16, 2015

18.0K
Microbiologically Induced Calcite Precipitation Mediated by Sporosarcina pasteurii
09:04

Microbiologically Induced Calcite Precipitation Mediated by Sporosarcina pasteurii

Published on: April 16, 2016

22.7K

Area of Science:

  • Environmental Science
  • Hydrology
  • Isotope Geochemistry

Background:

  • Tritium (hydrogen-3) is a key environmental tracer.
  • Understanding its concentration and seasonal variations is crucial for environmental monitoring.
  • Previous studies have not fully detailed recent tritium levels across Japan.

Purpose of the Study:

  • To investigate recent tritium concentrations in precipitation across Japan.
  • To analyze the seasonal cycle of tritium in precipitation.
  • To identify geographical patterns in tritium levels.

Main Methods:

  • Monthly precipitation samples were collected from Hokkaido, Gifu, and Okinawa prefectures.
  • Sampling occurred from June 2014 to December 2017.
  • Tritium concentrations were measured using established analytical techniques.

Main Results:

  • Mean tritium concentrations were 0.62 ± 0.27 Bq L-1 (Hokkaido), 0.32 ± 0.12 Bq L-1 (Gifu), and 0.13 ± 0.05 Bq L-1 (Okinawa).
  • Tritium concentration showed a positive correlation with latitude.
  • Peak tritium levels were observed in spring, with the lowest in summer.

Conclusions:

  • Tritium concentration in Japanese precipitation increases with latitude.
  • Seasonal variations in tritium levels were observed, with spring peaks and summer lows.
  • Further research into precipitation chemistry and meteorology is needed to explain these cycles.