A new closed-vessel conductively heated digestion system: fostering plant analysis by inductively coupled plasma optical emission spectroscopy

Miranda, Kelber; Pereira-Filho, Edenir Rodrigues; Neto, José Anchieta Gomes

doi:10.1039/c3ja50369k

Cited by 10 publications

(5 citation statements)

References 21 publications

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“…During digestion, the main product NO 2 reacts with O 2 and H 2 O to regenerate HNO 3 . Nitric acid regeneration removes the excess of NO 2 from the gaseous phase and reduces the risks of overpressure (Miranda et al 2014a). In the CHDS, an immersed temperature sensor is not mandatory because the heat transfer is limited by the temperature of the aluminum heating block.…”

Section: Resultsmentioning

confidence: 99%

Determination of Ca, Cd, Cu, Fe, K, Mg, Mn, Mo, Na, Se, and Zn in Foodstuffs by Atomic Spectrometry After Sample Preparation Using a Low-Cost Closed-Vessel Conductively Heated Digestion System

et al. 2015

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Establishing fast, simple, low-cost, and efficient sample preparation procedures to determine elements in foodstuffs is a relevant aspect for nutritional and health purposes. For this reason, the recently proposed closed-vessel conductively heated digestion system (CHDS) was evaluated for the digestion of milk powder, chocolate powder, and soluble coffee samples aiming for Ca, Cu, Fe, K, Mg, Mn, Na, and Zn determinations by high-resolution continuum source flame atomic absorption spectrometry (HR-CS FAAS) and Cd, Mo, and Se determinations by inductively coupled plasma mass spectrometry with tandem configuration (ICP-MS/MS). The accuracy was evaluated by analyzing two milk certified reference materials digested by the CHDS and a microwave oven for comparison. When using the CHDS, recoveries for the analytes varied from 91 to 104 %. For microwave digestions, recoveries within the 94-109 % intervals were obtained. The method was then applied to the samples. For comparative purposes, the analytes were also determined in the samples after microwave digestion, and the results between the two digestion systems showed no differences based on a paired t test at a 95 % confidence level. Similar analytical blanks were obtained because quartz digestion tubes were used in both digestion systems. The CHDS with quartz tubes is an interesting alternative for laboratories dedicated to large-scale routine analysis because volatile elements usually found in very low concentrations in food samples such as Cd and Se can also be determined.

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Section: Resultsmentioning

confidence: 99%

Determination of Ca, Cd, Cu, Fe, K, Mg, Mn, Mo, Na, Se, and Zn in Foodstuffs by Atomic Spectrometry After Sample Preparation Using a Low-Cost Closed-Vessel Conductively Heated Digestion System

et al. 2015

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“…According to the results obtained, it is possible to digest plant materials with the CHDS without pressure and temperature control. This is attained by performing a predigestion, limiting the sample mass to 200 mg, using an adequate amount of hydrogen peroxide in the acid mixture to remove NO 2 from the gaseous phase 9 and optimizing a heating program with target temperatures, ramps and hold times. In the CHDS, the heat transfer is limited by the temperature of the aluminum heating block.…”

Section: Resultsmentioning

confidence: 99%

“…9 A closed vessel microwave (MW) digestion system (Multiwave, Anton Paar, Graz, Austria) equipped with a rotor for 6 reaction PFA vessels (internal volume of 50 mL, minimum lling volume of 6 mL) and a temperature sensor was employed for comparison of digestion efficiency. Details about this system are described elsewhere.…”

Section: Instrumentationmentioning

confidence: 99%

High-throughput sugarcane leaf analysis using a low cost closed-vessel conductively heated digestion system and inductively coupled plasma optical emission spectroscopy

2014

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Most small to medium-size laboratories involved in foliar diagnosis make use of digestion blocks with borosilicate glass tubes to decompose leaf samples. Then, the elements of interest can be simultaneously determined by ICP OES, except boron, because blank signals for this element are greater than the analytical signals. To determine boron by ICP OES, all samples are digested again using a dry ashing procedure, sometimes requiring up to 24 h per a small group of samples. In order to provide a low-cost alternative to prepare leaf samples for elemental determination, including boron, quartz digestion tubes were developed for the recently proposed closed-vessel conductively heated digestion system (CHDS). The performance of the CHDS with quartz tubes was evaluated by converting sugarcane leaf samples into solutions for subsequent determinations of macro-(Ca, K, Mg, P, and S) and micronutrients (Al, B, Cu, Fe, Mn and Zn) by ICP OES. The analytical procedure was validated with three certified reference materials and applied to ten sugarcane leaf samples. The results obtained for Al, B, Ca, Cu, Fe, K, Mg, Mn, P, S and Zn determined by ICP OES and the conductively heated digestion system with quartz tubes were in fair agreement with those obtained after closed-vessel microwave-assisted digestion. For all elements determined, the relative standard deviation (n ¼ 3) was usually below 5%. The use of quartz digestion tubes resulted in lower blank values for boron, allowing the determination of all elements of interest in one run.

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“…Calibration curves were drawn from the 0, 5, 10, 20, 50, 100, 200, 500 and 1000 ppb standard solutions. The total metal concentrations were determined by Inductively Coupled Plasma (ICP-MS) Agilent Technologies 7700 series ICP-MS 16,[49][50][51] .…”

Section: Heavy Metal Analysismentioning

confidence: 99%

Garlic (Allium sativum) based interplanting alters the heavy metals absorption and bacterial diversity in neighboring plants

Hussain

Wei

Luo

et al. 2021

Sci Rep

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Heavy metals are naturally occurring elements that have a high atomic weight and let out in the environment by agriculture, industry, mining and therapeutic expertise and thrilling amassing of these elements pollutes the environment. In this study we have investigated the potential of garlic interplanting in promoting hyper accumulation and absorption of heavy metals to provide a basis for phytoremediation of polluted land. Monoculture and inter-plantation of garlic were conducted to investigate the absorption of cadmium and lead contamination in the land. A group of experiments with single planting (monoculture) of Lolium perenne, Conyza canadensis and Pteris vittata as accumulators were used. The results have shown that garlic has a potential as a hyper accumulate and absorb heavy metals. It was found that the accumulation of Cd and Pb was much higher with inter-planting. Garlic boosts up the absorption of heavy metals in Lolium perenne of Cd 66% and Pb 44% respectively. The Inter-planting of garlic with Pteris vittata promotes the Cd 26% and Pb 15%. While the maximum accumulation of Lead 87% and Cadmium 77% occurred in Conyza canadensis herb plant. The bacterial diversity in the soil was analyzed for each experimental soil and was found that the Proteobacteria, Acidobacteria, Actinobacteria, Firmicutes, and Planctomycetes were commonly abundant in both single planting (monoculture) of ryegrass and interplanting ryegrass with garlic habitats. Variances were observed in the bacterial floral composition of single (monoculture) and intercropping (interplant) soils. Relative abundance of bacterial taxa revealed that the proportion of Proteobacteria, Acidobacteria, and Actinobacteria in the inter-planting group was slightly higher, while Firmicutes and Planctomycetes were low. This study provides the evidence to control the heavy metals contaminated soils with weed species. Growth promotion and heavy metal uptake of neighboring plants proved the specific plant-plant and plant-microbial associations with garlic plants. This inter-planting strategy can be used to improve heavy metal absorption.

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A new closed-vessel conductively heated digestion system: fostering plant analysis by inductively coupled plasma optical emission spectroscopy

Abstract: A high-throughput, low cost and efficient device based on conductive heating and closed-vessels was developed and applied to plant digestion.

Cited by 10 publications

References 21 publications

Determination of Ca, Cd, Cu, Fe, K, Mg, Mn, Mo, Na, Se, and Zn in Foodstuffs by Atomic Spectrometry After Sample Preparation Using a Low-Cost Closed-Vessel Conductively Heated Digestion System

Determination of Ca, Cd, Cu, Fe, K, Mg, Mn, Mo, Na, Se, and Zn in Foodstuffs by Atomic Spectrometry After Sample Preparation Using a Low-Cost Closed-Vessel Conductively Heated Digestion System

High-throughput sugarcane leaf analysis using a low cost closed-vessel conductively heated digestion system and inductively coupled plasma optical emission spectroscopy

Garlic (Allium sativum) based interplanting alters the heavy metals absorption and bacterial diversity in neighboring plants

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