Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Sun, Jia; Ma, Chunmei; Zhou, Bin; Jiang, Jiawei; Zhao, Cheng: Compound identification and molecular abundance distribution of long-chain n-alkanes from a peat sequence in the middle Yangtze river catchment, southeast China. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.931132 (unpublished dataset)

Show MapGoogle Earth

Abstract:
The samples from our peat core were collected using a manual sampling drill and PVC tubes with a diameter of 0.60m. The sampling site is located at Xiyaohu(XYH) peatland (28.44°N, 115.40°E, elevation: 735m). The penetration length is 3.35m, and the total length of the core is 3.00m.
From 2016-9 to 2016-11, the core was subsampled at 5- and 4-cm intervals through the top and bottom 0.15m, respectively .The leaf-wax n-alkanes were freeze-dried and homogenized. Sediments were solvent-extracted with 9:1 v/ v dichloromethane (DCM) to methanol (MeOH) at 30 °C for 30 min and 1500 psi for 5 min using an accelerated solvent extraction system. Total lipid extracts were separated using column chromatography through silica gels into the hexane and neutral fractions, using hexane and 9:1 v/v DCM: MeOH, respectively. The hexane and neutral fractions contain n-alkanes and the remaining parts of the lipid, such as long-chain ketene, respectively.
From 2017-2 to 2017-4, compound identification and the molecular abundance distribution of long-chain n-alkanes were detected by gas chromatography (GC, Agilent 7890B) equipped with a flame ionization detector (FID) for separation and quantification. The FID temperature was 310 °C, the H2 speed was 30 mL/min, the airflow speed was 400 ml/min, and each sample tested was 1 µL. Individual n-alkane identification was performed by comparing the retention times of n-alkanes in samples with the aforementioned standards.
Keyword(s):
d13C; dD; leaf-wax n-alkane
Coverage:
Latitude: 28.440000 * Longitude: 115.400000
Date/Time Start: 2015-04-01T00:00:00 * Date/Time End: 2015-04-01T00:00:00
Minimum DEPTH, sediment/rock: 0.020 m * Maximum DEPTH, sediment/rock: 2.990 m
Event(s):
XYH_peatland * Latitude: 28.440000 * Longitude: 115.400000 * Date/Time: 2015-04-01T00:00:00 * Elevation: 735.0 m * Location: Xiyaohu, China * Method/Device: Hand drill (HDRILL) * Comment: Core length: 3 meter
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Depth, top/minDepth topmMa, Chunmei
2Depth, bottom/maxDepth botmMa, Chunmei
3DEPTH, sediment/rockDepth sedmMa, ChunmeiGeocode – Mean depth
4AgeAgea AD/CEMa, Chunmei
5n-Alkane C17 of total alkanesC17%Ma, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
6n-Alkane C18 of total alkanesC18%Ma, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
7n-Alkane C23 of total alkanesC23%Ma, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
8n-Alkane C25 of total alkanesC25%Ma, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
9n-Alkane C27 of total alkanesC27%Ma, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
10n-Alkane C29 of total alkanesC29%Ma, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
11n-Alkane C31 of total alkanesC31%Ma, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
12Average chain lengthACLMa, Chunmei
13Aquatic portionPaqMa, Chunmei
14Carbon Preference IndexCPIMa, Chunmei
15n-Alkane, C23/C31 ratioC23/C31Ma, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
16n-Alkane C17, per unit sediment massC17/sedµg/gMa, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
17n-Alkane C18, per unit sediment massC18/sedµg/gMa, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
18n-Alkane C19, per unit sediment massC19/sedµg/gMa, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
19n-Alkane C20, per unit sediment massC20/sedµg/gMa, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
20n-Alkane C21, per unit sediment massC21/sedµg/gMa, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
21n-Alkane C22, per unit sediment massC22/sedµg/gMa, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
22n-Alkane C23, per unit sediment massC23/sedµg/gMa, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
23n-Alkane C24, per unit sediment massC24/sedµg/gMa, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
24n-Alkane C25, per unit sediment massC25/sedµg/gMa, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
25n-Alkane C26, per unit sediment massC26/sedµg/gMa, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
26n-Alkane C27, per unit sediment massC27/sedµg/gMa, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
27n-Alkane C28, per unit sediment massC28/sedµg/gMa, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
28n-Alkane C29, per unit sediment massC29/sedµg/gMa, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
29n-Alkane C30, per unit sediment massC30/sedµg/gMa, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
30n-Alkane C31, per unit sediment massC31/sedµg/gMa, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
31n-Alkane C32, per unit sediment massC32/sedµg/gMa, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
32n-Alkane C33, per unit sediment massC33/sedµg/gMa, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
33n-Alkane C34, per unit sediment massC34/sedµg/gMa, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
34n-Alkane C35, per unit sediment massC35/sedµg/gMa, ChunmeiGas chromatography, Agilent 7820B, equipped with a flame ionization detector (FID)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
2205 data points

Download Data (login required)

Download dataset as tab-delimited text — use the following character encoding:

View dataset as HTML (shows only first 2000 rows)