The NIR Community from ASD Inc., a Malvern Panalytical company

Application Roundup: Mapping alteration in drill core, remote sensing and vegetation mapping with a FieldSpec spectroradiometer

March 03, 2016

Mapping alteration in geothermal drill core using a field portable spectroradiometer

This paper, by long time ASD customer Wendy Calvin, describes how an ASD's FieldSpec® spectroradiometer has been used to analyze drill cores in geothermal systems. These types of drill holes are typically used in early-stage geothermal exploration and help to locate geothermal resources for energy generation (see the paper's introduction section for a good summary of the application). While in this case a FieldSpec was used, this would be a better fit for a TerraSpec® 4 plus TSG® software or a TerraSpec Halo. Here is the abstract:

Asian mining company uses ASD TerraSpec analyzer to help characterize alteration assemblages in Sumatra

January 26, 2016

With ore reserves of 2.7 million ounces of gold and 27 million ounces of silver, the Martabe Mine is one of the largest in Indonesia. Looking to expand the life of the northern Sumatran epithermal gold mine, G-Resources has been conducting a regional exploration program around the mine and has identified additional epithermal deposits as well as potential gold-copper porphyry mineralization. With the additional deposits G-Resources now estimates the resource at 7.4 million ounces of gold and 70 million ounces of silver.

ASD's FieldSpec spectroradiometer used to detect cryptotephra

January 08, 2016

Many volcanic eruptions result in ejection of volcanic ash into the atmosphere. This volcanic ash is deposited over large areas and creates a record of past eruption events. These very thin volcanic ash layers, referred to as cryptotephra, are often invisible to the naked eye. The study of these layers has a range of applications, from evaluating geologic risk of future eruptions to the use of the pattern of layers to provide isochrons for correlation across archaeological sites.

In "Evaluating Reflectance Spectroscopy as a Method of Rapid Cryptotephra Identification" Elizabeth Fisher describes a method for detecting cryptotephra layers in marine sediments using an ASD FieldSpec FR spectrometer. The key signatures of the cryptotephra include increase Fe3+ absorption in the 950 nm region and absorption by clays in the 2,200 nm region.

Application Roundup: ASD's LabSpec used to study olive oil and artwork

November 18, 2015

In the recent research summarized below, researchers used a LabSpec lab analyzer to study olive oil characterization and to evaluate artwork condition.

ASD's LabSpec used in study to improve methods of olive oil characterization

In "Optical path length and wavelength selection using Vis/NIR spectroscopy for olive oil's free acidity determination" Juan Francisco García Martín of the Spanish National Research Council used an ASD LabSpec near infrared analyzer to improve the NIR method for determination of olive oil free acidity.

Spider mites suck: detection of two spotted spider mites infestation

August 04, 2015

The latest publication by Herrmann et al. (2015) builds on their past work in the early detection of two spotted spider mites (TSSM) on agricultural crops.

Hot ‘n High! The TerraSpec Halo visits extreme temperatures

June 26, 2015

Application Roundup: a summary of ASD instruments in action

June 16, 2015

Non-destructive fruit testing

It is becoming quite common to utilize NIR spectroscopy in the field or greenhouse to measure fruit sweetness. This is useful both for deciding when to harvest, but also when running a breeding program. The ability to rapidly and non-destructively select plants with the desired traits allows fruits on those plants to mature and have their seeds collected. A recent study goes beyond sweetness and measures pH - when eaten, the pH of a fruit or vegetable is closely related to the perceived tartness. In the paper listed below, Yahaya et al. developed pH calibrations for mangoes. Others have shown that other fruit properties, such as crispness or firmness in apples, are also quantifiable using near infrared spectroscopy.

FieldSpec spectroradiometer used to monitor drought stress of mandarin orange trees

January 30, 2015

In their paper that was published in the July 2014 issue of Agricultural Water Management, Panigrahia et al. found that it was possible to utilize deficit irrigation of mandarin orange groves while achieving near maximum fruit yield. A level of irrigation that resulted in 50% evapotranspiration (relative to full irrigation) resulted in significant water savings while providing yield that was within 2-4% of the full irrigation yield; fruit quality was a good or better than that achieved with full irrigation.

ASD's FieldSpec headed to Mars!...well, sort of...

November 25, 2014

Prototype work is ongoing for the European Space Agency's (ESA) 2018 ExoMars mission. One component of the mission, the Pasteur Rover, features Ma_MISS (Mars Multispectral Imager for Subsurface Studies), a drill with an integrated miniaturized spectrometer operating in the in the 400-2200 nm wavelength range, that will help understand the distribution and state of hydrous minerals in the Martian soils.

Building a better potato...

November 18, 2014

With their shallow root systems potatoes are highly susceptible to both drought and heat. Drought reduces both the amount of foliage as well as inducing early leaf senescence. Similarly, heat stress also results in early leaf senescence. Since foliar abundance and function directly impact tuber formation and growth, drought and heat stress negatively impact yields.

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