MétaCan
Menu
Back to cohort

"Desenvolvimento de metodologia analítica para a determinação de hidrocarbonetos policíclicos aromáticos (PAHs) em amostras de água utilizando uma interface SPME/HPLC/DAD"

2006· dissertation· pt· W2533026342 on OpenAlexaff
Fernanda Cristine Spoljaric Ferreira

Bibliographic record

Venuenot available
Typedissertation
Languagept
FieldChemistry
TopicAnalytical chemistry methods development
Canadian institutionsMicrosemi (Canada)
Fundersnot available
KeywordsChemistry

Abstract

fetched live from OpenAlex

\n Este trabalho descreve a otimização e validação de um método analítico para a análise de hidrocarbonetos policíclicos aromáticos (PAHs) em água usando uma interface SPME/LC/DAD. Parâmetros como tipos de fibra, tempo de extração, temperatura e força iônica foram estudados no modo \\"off line\\" e a influência destes na eficiência de extração foi avaliada. Os melhores resultados foram obtidos com a fibra Carbowax/templeted resin. Uma interface \\"lab made\\" foi utilizada para a etapa de validação e as curvas de calibração mostraram boa linearidade (r>0,99) para a maioria dos compostos analisados, tanto na linearidade da amostra como na linearidade do padrão. Os dados de precisão obtidos na concentração de trabalho variaram de 1 a 3%, aproximadamente, e os valores de recuperação se mantiveram na faixa de 4 a 27%. Os PAHs foram determinados na faixa de 0,025 micro g até 0,5 micro g. Pode-se considerar os valores obtidos nos itens de precisão e linearidade satisfatórios para a análise dos PAHs, considerando-se os critérios internacionais estabelecidos para esta classe de compostos, mas o método não atende as especificações relacionadas a recuperação e faixa de concentração.\n

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.002
metaresearch head score (Gemma)0.003
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesMeta-epidemiology (narrow), Research integrity, Insufficient payload (model declined to judge)
Consensus categoriesMeta-epidemiology (narrow), Research integrity
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.077
Threshold uncertainty score0.999

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0020.003
Meta-epidemiology (narrow)0.0030.003
Meta-epidemiology (broad)0.0030.001
Bibliometrics0.0000.001
Science and technology studies0.0000.000
Scholarly communication0.0010.000
Open science0.0020.001
Research integrity0.0040.003
Insufficient payload (model declined to judge)0.0060.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.047
GPT teacher head0.359
Teacher spread0.312 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; both teacher heads agree on what is shown here.

Study designBench or experimental
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations2
Published2006
Admission routes1
Has abstractyes

Explore more

Same topicAnalytical chemistry methods developmentFrench-language works237,207