Artikkelit kirjoittajalta Marja-Leena Saastamoinen
Fosforin määrityksestä turpeesta.
English title: On the determination of phosphorus in peat.
Tiivistelmä |
Näytä lisätiedot
|
Artikkeli PDF-muodossa |
Tekijät
According to the investigations of Kaila, the phosphorus content in Finnish peat-lands varies at the range from 190 ppm to over 2000 ppm. (Kaila 1955, 1956). The amount of organic phosphorus lies between 55 % and 95 %.
The determination of the phosphorus from the matrix of organic matter is a tedious process. (Haiman 1972, John 1970, Alexander and Robertson 1968, Kaila 1955).
The aim of our study was to develop a method for the phosphorus determination in which the metals also could be determined after the same sample treatment.
The most common digestion method for the organic matter is the Kjeldahl wet digestion. It cannot, however, directly be employed to the metal determination with the atomic absorption technique.
We used a small autoclave ( ~ 25 cm3) made from teflon in the sample digestion. The amount of the sample was 0.5—1.0 g and then 11.7 cm3 of perchloric acid
(70 %), 6.7 cm3 of nitric acid (65 %) and 10 cm3 of hydrogen fluoride (40 %) was added. The sample was heated for five hours at 140 °C. The phosphorus was determined according to the method by Lueck and Boltz with the difference, that the absorbance of the solution was measured exactly after one hour since the last reagent addition. The results are presented in Table 1 and Figs. 1 and 2.
The comparative determinations were made after the Kjeldahl digestion with the method by Kaila. The results were in agreement.
The advantage of the autoclave method is its suitability to the routine work in the phosphorus determinations of peat, peat coke and wet carbonized peat, for instance. The same solution can be used to the metal determinations and the use of the autoclave improves the analytical accuracy and reduces the amounts of poisonous gases in the laboratory air.
-
Tummavuori,
Sähköposti:
ei.tietoa@nn.oo
- Nyrönen, Sähköposti: ei.tietoa@nn.oo
- Saastamoinen, Sähköposti: ei.tietoa@nn.oo
Click this link to register to Suo - Mires and peat.
Jos olet rekisteröitynyt käyttäjä, kirjaudu sisään tallentaaksesi valitsemasi artikkelit myöhempää käyttöä varten.
Valitsemasi artikkelit
Lähetä sähköpostiin
Lähetä sähköpostiin
Sabo E. D.,
(1974)
Forest drainage and management of natural resour..
Suo - Mires and peat
vol. 25
no. 5
artikkeli 9433
(poista)
| Muokkaa kommenttia
Koski T.,
Yliruokanen I.
(1980)
Usability of peat for monitoring of metal conten..
Suo - Mires and peat
vol. 31
no. 4
artikkeli 9511
(poista)
| Muokkaa kommenttia
Mäkinen Y.,
(1974)
On the cultivation of cloudberry
Suo - Mires and peat
vol. 25
no. 3-4
artikkeli 9429
(poista)
| Muokkaa kommenttia
Surakka S.,
Kämppi A.
(1971)
Infiltration of waste water into peat soil
Suo - Mires and peat
vol. 22
no. 3-4
artikkeli 9387
(poista)
| Muokkaa kommenttia
Lappalainen E.,
(1971)
On the age of various types of paludification in..
Suo - Mires and peat
vol. 22
no. 1
artikkeli 9382
(poista)
| Muokkaa kommenttia
Karsisto M.,
(1979)
Effect of forest improvement measures on activit..
Suo - Mires and peat
vol. 30
no. 4-5
artikkeli 9498
(poista)
| Muokkaa kommenttia
Härkönen K.,
(1985)
Classifying peat-lands for forest drainage and g..
Suo - Mires and peat
vol. 36
no. 4-5
artikkeli 9606
(poista)
| Muokkaa kommenttia
Teivainen T.,
(1974)
Peatlands as a habitat of mammals
Suo - Mires and peat
vol. 25
no. 1
artikkeli 9420
(poista)
| Muokkaa kommenttia
Heikurainen L.,
Kenttämies K.
et al.
(1978)
The environmental effects of forest drainage
Suo - Mires and peat
vol. 29
no. 3-4
artikkeli 9478
(poista)
| Muokkaa kommenttia
Seppälä K.,
(1976)
Relationship between the stem diameter of trees ..
Suo - Mires and peat
vol. 27
no. 3
artikkeli 9457
(poista)
| Muokkaa kommenttia
Sippola J.,
Erviö R.
et al.
(1985)
Soil and needle analyses as indicators of tree g..
Suo - Mires and peat
vol. 36
no. 3
artikkeli 9605
(poista)
| Muokkaa kommenttia
Antola A.,
(1971)
Observation of aspects involved with nature cons..
Suo - Mires and peat
vol. 22
no. 6
artikkeli 9390
(poista)
| Muokkaa kommenttia
Koivisto I.,
(1985)
The Wally Creek Area Forest Drainage Experiment ..
Suo - Mires and peat
vol. 36
no. 2
artikkeli 9602
(poista)
| Muokkaa kommenttia
Suo - Mires & Peat
