Premium
A Noncontaminating Probe for Injecting Radioactive Solution into Soil
Author(s) -
Kafkafi U.
Publication year - 1965
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1965.03615995002900030029x
Subject(s) - hypodermic needle , brass , tube (container) , radioactive source , natural rubber , materials science , falling (accident) , composite material , mechanical engineering , optics , physics , engineering , metallurgy , detector , medicine , environmental health , copper , syringe
A probe was constructed in order to place accurately small volumes of radioactive solution in soil up to 160‐cm depth. The implement has the advantage of delivering the solution at its very end. It is constructed of an iron pipe with a rubber cap at the end of it. Inside the pipe there is a movable brass tube with a hypodermic needle at its end. When pushing down the brass tube the needle is forced out of the protecting rubber cap. A plastic tube is tightly connected to the hypodermic needle at one side and to a “recipient set for blood” at the other side. The solution flows from a container by gravitation, and the amount is controlled by counting the drops falling in the “recipient set”. With such a probe, 0.5 cm 3 were placed accurately in 1,400 holes varying from 20 to 120 cm in depth in 12 work hours, the access holes having been prepared by another team.