Analysis

Pricing

Sample Preparation
  ·Difficult Combustion    Materials: Soils,    Sediments, Filters,    Wood, Carbonates

 ·Enriched/Tracer

 ·Encapsulation Tips

 ·Shipping Tips


Sample Weight Calculator

Sample Submission
































UC Davis Plant Sciences


UC Davis Stable Isotope Facility - Sample Weight Calculator

Instructions:

To calculate your optimal sample weights, enter %N and %C values for your sample material in the blue cells. Calculated results are shown in the green cells. See table for examples of %N and %C values for various materials. Samples must not exceed either 75mg total weight or 12mg of carbon. Enriched sample weights should be optimized for 20 ug N, with a maximum of 100 ug N (i.e. use the "Smallest sample weight" to "Optimal sample weight" as your target range). Contact the Stable Isotope Facility if you don't have the minimum amount of material required.


Please send feedback or questions to sif@ucdavis.edu.

Input values for your sample material (see list below for examples)
percent nitrogen (%N)
percent carbon (%C)
Enter values here
%
%

Acceptable range of sample weights
For 15N analysis
For 13C analysis
For dual isotope analysis (15N + 13C)*
Smallest sample weight (mg)
Your optimal sample weight (mg)
Largest sample weight (mg)
Your optimal sample contains:

C:N of your sample* =
13.3

*13C and 15N can be measured on a single sample only if the C:N value is less than 100

Examples of %N and %C of sample materials:
Sample Material
Plant - leaves
Plant - roots
Plant - stems
Plant - wood
Plant - grain flour (wheat, rye, rice)
Plant - grass, alfalfa
Soil - low OM
Soil - medium OM
Soil - high OM
Sediment - bulk
Animal, Fish, Invertebrate tissue
Human Hair
%N
2-3%
0.8-1.3%
0.4-0.8%
0.02-0.06%
1.5-3.5%
2.5-5%
0.1-0.15%
0.2-0.3%
0.3-1.0%
0.05-0.15%
10%
14%
%C
42-50%
36-40%
46-48%
40-44%
43-47%
45-47%
0.8-1.2%
2.5-3.5%
10-14%
0.5-1.5%
40%
47%







 
e-mail: sif@ucdavis.edu | phone: 530-752-8100 | fax: 530-752-4361
UC Davis Stable Isotope Facility | Department of Plant Sciences
One Shields Avenue | Davis, California, 95616 | USA