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Wed, 21 Feb 2007 10:46:44 +0100 |
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Dear all,
I 'm so concerned, as we have often the same problem with some sediment
wich are very poor in N (0.02%), so I'm really interesting in the
answer, as I often doubt that we have a good combustion with 100 or
200mg sample.
Ruben G. Chavez a écrit :
>Dear all,
>
>I am analyzing SOIL NC in EA and I need at least 75ugN in the sample to get a
>good linearity. With this amount of N I need, I need to weigh up to 200 mg of
>finely ground sample due to low %N in the sample. Please help me on how to
>know if I have a good combustion of the sample. Is there a specific
>combustion catalyst for plant or soil combustion?
>
>Many thanks for your help.
>
>
>Ruben G. Chavez
>Officer
>Analytical Service Laboratories
>Mail: DAPO Box 7777, Metro Manila, Philippines
>Tel: +63(2) 580-5600 ext. 2419
>Fax: +63(2) 580-5699
>Web: www.irri.org
>
>
>
--
Isabelle Billy
UMR EPOC - 5805
Département de Géologie et Océanographie
Université de Bordeaux I
avenue des facultés
33405 TALENCE Cedex, France
email [log in to unmask]
tel. (33) 05 40 00 33 14
fax (33) 05 40 00 08 48
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