Status: 

Ongoing

Title

Chemistry of stream water from the Luquillo Mountains
Summary

DOI: 

10.6073/pasta/f9df56348f510da0113b1e6012fa2967

Short name: 

LUQMetadata20

Data set ID: 

20
Dates

Publication Date: 

2011-04-11 00:00:00
People

Owner/Creator: 

Contact: 

Additional Project roles: 

Name: Eda Melendez-Colom Role: Data Manager
Name: Douglas A. Schaefer Role: Associated Researcher
Name: Frederick Scatena (In Memorium) Role: Associated Researcher
Methodology

Methods: 

Analytical Techniques
pH - Electrometric with combination electrode
Conductivity - Conductivity bridge
Cl - up to 1989 by automated colorimetric analysis (thiocyanate); after 1989 by liquid chromatography with conductivity detection
NO3-N - up to 1989 by automated colorimetric analysis (Cd-Cu reduction); after 1989 by liquid chromatography with UV or conductivity detection
SO4-S - Liquid chromatography, conductivity detection
Na, K, Mg, and Ca - up to 1994 by atomic absorption spectroscopy; after 1994 by ion chromatography with conductivity detection
NH4-N - automated colorimetric analysis (phenolhypochlorite)
PO4-P - automated colorimetric analysis (molybdate blue)
DOC - up to 1998 by persulfate oxidation (McDowell et al. 1987); after 1998 by high temperature catalytic oxidation
TDN - prior to 1998 by persulfate oxidation and automated colorimetric analysis; after 1998 by high temperature catalytic oxidation with chemiluminescent detection
TDP - by persulfate digestion followed by automated colorimetric analysis
SiO2 - automated colorimetric analysis (molybdate blue)

Table 1. Data Abbreviations, Detection Limits, and Units of Measure

Datum

Abbreviation

Detection limit

Units

pH

pH

pH units 

Conductivity 

Cond

micromho/cm 

Chloride 

Cl

0.1

mg/L 

Nitrate 

NO3-N 

3-10

mg N/L 

Sulfate 

SO4-S

0.1

mg S/L

Sodium 

Na 

0.1

mg/L

Potassium

K

0.05

mg/L 

Magnesium 

Mg 

0.1

mg/L  

Calcium 

Ca 

0.1

mg/L

Ammonium 

NH4-N 

2-10

mg N/L 

Soluble Reactive Phosphate

PO4-P

3

mg P/L

Dissolved Organic Carbon

DOC

0.1

mg/L

Total Dissolved Nitrogen

TDN

0.1

mg/L

Total Dissolved Phosphorus

TDP

3

mg/L

Silica

SiO2

0.1

mg/L as SiO2

Instrumentation: 

Electrometric with combination electrode

Conductivity bridge

liquid chromatography with conductivity detection

liquid chromatography with UV or conductivity detection

Liquid chromatography, conductivity detection

ion chromatography with conductivity detection

automated colorimetric analysis (phenolhypochlorite)

automated colorimetric analysis (molybdate blue)

high temperature catalytic oxidation

high temperature catalytic oxidation with chemiluminescent detection

persulfate digestion

Additional information: 

In this new LUQ website-IM system, this data set was was split into two data sets, separating the chemistry data from rain and throughfall collectors into LUQMetadata 174: Chemistry of rainfall and throughfall from El Verde and Bisley.

Status: 

Ongoing

Time Period: 

Long-Term
Categories

EML is valid: 

Yes