Quality aspects in laboratories for soil and plant analysis

Houba, V.J.G.; Novozámský, I.; Lee, J.J. van der

doi:10.1080/00103629609369560

Cited by 13 publications

(5 citation statements)

References 5 publications

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“…It can be seen from Table (5) that the concentration of Fe, Mn, Zn and Cu in fruits were tend to be more at the beginning of May and June, then decreased, with fruit development. Similar results were shown by Sawaya et al (1983), who found that minerals (Fe, Cu and Zn) decreased as fruit progressed in maturity and Houba et al , (1996) who mentioned that nutrient contents change during plant growth.…”

Section: Effect Of Sampling Timesupporting

confidence: 88%

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Micronutrient Changes and Chemical Properties in Samany Date Palm Cultivar as Affected by Nitrogen and Potassium Application

Shaaban¹,

Soliman

2007

Journal of Plant Production

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Section: Effect Of Sampling Timesupporting

confidence: 88%

“…In this connection, Labanauskas & Nixon (1962) found large difference in nutrient concentration in leaflets distribution along the length of the rachis. Also, Houba et al , (1996) mentioned that nutrient contents differ between the different plant parts.…”

Section: Effect Of Leaflets Positionmentioning

confidence: 99%

Micronutrient Changes and Chemical Properties in Samany Date Palm Cultivar as Affected by Nitrogen and Potassium Application

Shaaban¹,

Soliman

2007

Journal of Plant Production

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“…see Houba et al 1996). Still, contamination from grinding tools was able to double the levels measured in the control, leading to unacceptably biased results.…”

Section: Eoe Ect Of Dioe Erent Sample Treatmentsmentioning

confidence: 97%

Influence of laboratory homogenization procedures on trace element content of food samples: an ICP-MS study on soft and durum wheat

Cubadda

Baldini²,

Carcea³

et al. 2001

Food Additives and Contaminants

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Sample contamination as a consequence of abrasion of grinding tools during the homogenization of food materials to be analysed for trace elements was addressed. The possible release of 15 trace elements (Al, As, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, Se, Sn, V, Zn) from six different grinding and milling devices, operating either continuously or discontinuously, was evaluated. All the devices were commercially available and were representative of models usually employed in food and agricultural laboratories. Wheat grains belonging to one soft and one durum cultivar were used as test material. The determination of the analyte concentrations in subsamples submitted to the different preparation treatments was performed by quadrupole inductively coupled plasma mass spectrometry (Q-ICP-MS). Accordingly, a suitable digestion method was developed and the ArC+ interference affecting Cr determination was evaluated and corrected. Statistical differences with respect to the control were detected for 10 elements (Al, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb) and in most cases contamination of the samples was traced back to the composition of the grinding equipment. None of the investigated devices was contamination-free with respect to all of the quantified elements. Abrasion of the grinding tools was higher with durum wheat than with soft wheat as a consequence of their different hardiness.

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“…The functional form of p C (shown above) indicates that inspection errors typically push the cost/benefit relationship in the direction of doing no inspection (Vander Wiel and Vardeman, 1994), and must be controlled to maximize the value provided by inspection. Inspection errors can arise due to errors in the collection, handling, and pretreatment of samples, failure of analytical equipment, departures from established laboratory protocol, errors in scoring assay results, and inaccuracy inherent to the assay itself (Houba et al, 1996). Most of the potential for errors arises through field and laboratory practices and systems.…”

Section: Quality Control Strategies and Assaysmentioning

confidence: 99%

Quality Control in the Development of Transgenic Crop Seed Products

Mumm¹,

Walters

2001

Crop Science

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their plant products at various points in seed and food production (Beever and Kemp, 2000). Grain handlers In light of (i) public concern with the safety of genetically modified must develop the capability to evaluate the presence or crops, (ii) the issue of food labeling, and (iii) governmental regulation of transgenic plants, quality control (QC) monitoring of the process proportion of transgenic grain in truckloads and other of Transgenic Seed Product Development (TSPD) is essential to grain lots as nontransgenic grain takes on identity-preprotecting research investments, maintaining compliance with governserved status. Likewise, food processors need to effecmental regulations, and ensuring customer satisfaction. The primary tively monitor supply chains within identity preservation goal of QC monitoring in TSPD is to ensure the authenticity (transsystems to maintain compliance with the labeling regenic event identity and purity) of seed materials used in product quirements demanded by some markets. Furthermore, testing, in the development of regulatory data packages for governthe efficient evaluation of the type of any transgenic mental review, and to develop seed volumes for commercial release. grain present in supply chains is important to ensure Monitoring is performed to confirm the presence of the presumed compliance with governmental regulation. The auditing transgenic event(s) and the absence of all others. Sophisticated QC requirement actually begins with the seed companies, strategies formulated to monitor the product development process and to maintain quality standards in the manufacturing industry can which develop crop seed products for retail markets. serve as a foundation in devising efficient strategies tailored to meet Presently, seed certification requirements are expanding needs in the seed industry. A number of considerations in the design The Process of Transgenic SeedPublic concern with the safety of transgenic crops, Product Developmentthe issue of food labeling, as well as governmental regulation of transgenic plants by U.S. and internationalThe general process of TSPD encompasses a number agencies has spawned much debate over measures reof steps from transformation to new product launch, quired to assess genetic components of these plants and Abbreviations: BC1, generation resulting from the first backcross to the recurrent parent (BC2-BC6 follow the same convention with the specific generation designated)

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Quality aspects in laboratories for soil and plant analysis

Cited by 13 publications

References 5 publications

Micronutrient Changes and Chemical Properties in Samany Date Palm Cultivar as Affected by Nitrogen and Potassium Application

Micronutrient Changes and Chemical Properties in Samany Date Palm Cultivar as Affected by Nitrogen and Potassium Application

Influence of laboratory homogenization procedures on trace element content of food samples: an ICP-MS study on soft and durum wheat

Quality Control in the Development of Transgenic Crop Seed Products

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