Robert A Isaac

1.6k total citations · 1 hit paper
14 papers, 961 citations indexed

About

Robert A Isaac is a scholar working on Analytical Chemistry, Pollution and Environmental Chemistry. According to data from OpenAlex, Robert A Isaac has authored 14 papers receiving a total of 961 indexed citations (citations by other indexed papers that have themselves been cited), including 5 papers in Analytical Chemistry, 4 papers in Pollution and 2 papers in Environmental Chemistry. Recurrent topics in Robert A Isaac's work include Analytical chemistry methods development (3 papers), Heavy Metals in Plants (3 papers) and Soil and Water Nutrient Dynamics (2 papers). Robert A Isaac is often cited by papers focused on Analytical chemistry methods development (3 papers), Heavy Metals in Plants (3 papers) and Soil and Water Nutrient Dynamics (2 papers). Robert A Isaac collaborates with scholars based in United States. Robert A Isaac's co-authors include William C. Johnson, J. Benton Jones, Paul F. Vendrell, Leticia Sonon, D. E. Kissel, J. B. Weber, Ling Li, Pirouz Kavehpour, Robert N. Candler and Ian R. Tibbetts and has published in prestigious journals such as Journal of Agricultural and Food Chemistry, Talanta and Agronomy Journal.

In The Last Decade

Robert A Isaac

14 papers receiving 829 citations

Hit Papers

Determination of Total Nitrogen in Plant Tissue, Using a ... 1976 2026 1992 2009 1976 100 200 300 400
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Determination of Total Nitrogen in Plant Tissue, Using a Block Digestor
    1976 432 citations Robert A Isaac, William C. Johnson Journal of AOAC INTERNATIONAL profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Robert A Isaac United States 9 483 221 196 136 106 14 961
E. E. Schulte United States 10 389 0.8× 268 1.2× 83 0.4× 93 0.7× 85 0.8× 19 842
L. E. Sommers United States 4 681 1.4× 280 1.3× 281 1.4× 107 0.8× 53 0.5× 5 950
Nathan L. Hartwig United States 13 644 1.3× 367 1.7× 425 2.2× 109 0.8× 59 0.6× 32 1.0k
Anne Kjersti Bakken Norway 18 422 0.9× 233 1.1× 236 1.2× 110 0.8× 39 0.4× 73 959
R. W. Sheard Canada 16 957 2.0× 751 3.4× 405 2.1× 269 2.0× 99 0.9× 47 1.7k
S. L. Fales United States 20 258 0.5× 118 0.5× 564 2.9× 174 1.3× 33 0.3× 54 965
L. A. Peterson United States 20 728 1.5× 607 2.7× 295 1.5× 247 1.8× 49 0.5× 57 1.4k
D. W. Nelson United States 14 851 1.8× 627 2.8× 429 2.2× 316 2.3× 50 0.5× 21 1.4k
AD Rovira Australia 22 1.3k 2.8× 538 2.4× 250 1.3× 162 1.2× 74 0.7× 40 2.0k
John M. Hart United States 11 303 0.6× 174 0.8× 109 0.6× 101 0.7× 54 0.5× 54 657

Countries citing papers authored by Robert A Isaac

Since Specialization
Citations

This map shows the geographic impact of Robert A Isaac's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Robert A Isaac with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Robert A Isaac more than expected).

Fields of papers citing papers by Robert A Isaac

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Robert A Isaac. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Robert A Isaac. The network helps show where Robert A Isaac may publish in the future.

Co-authorship network of co-authors of Robert A Isaac

This figure shows the co-authorship network connecting the top 25 collaborators of Robert A Isaac. A scholar is included among the top collaborators of Robert A Isaac based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Robert A Isaac. Robert A Isaac is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

14 of 14 papers shown
1.
2.
Kissel, D. E., Leticia Sonon, Paul F. Vendrell, & Robert A Isaac. (2009). Salt Concentration and Measurement of Soil pH. Communications in Soil Science and Plant Analysis. 40(1-6). 179–187. 81 indexed citations
3.
4.
Isaac, Robert A, et al.. (1991). Water Quality from Private Wells in Georgia. SMARTech Repository (Georgia Institute of Technology). 1 indexed citations
5.
Isaac, Robert A. (1990). Plants. Journal of AOAC INTERNATIONAL. 73(1). 142–143. 1 indexed citations
6.
Weber, J. B., et al.. (1987). Making Herbicide Rate Recommendations Based on Soil Tests. Weed Technology. 1(1). 41–45. 14 indexed citations
7.
Isaac, Robert A & William C. Johnson. (1985). Elemental Analysis of Plant Tissue by Plasma Emission Spectroscopy: Collaborative Study. Journal of AOAC INTERNATIONAL. 68(3). 499–505. 129 indexed citations
8.
Isaac, Robert A & William C. Johnson. (1984). Near Infrared Reflectance Spectroscopic Determination of Protein Nitrogen in Plant Tissue. Journal of AOAC INTERNATIONAL. 67(3). 506–509. 7 indexed citations
9.
Isaac, Robert A. (1980). Atomic Absorption Methods for Analysis of Soil Extracts and Plant Tissue Digests. Journal of AOAC INTERNATIONAL. 63(4). 788–796. 12 indexed citations
10.
Isaac, Robert A & William C. Johnson. (1976). Determination of Total Nitrogen in Plant Tissue, Using a Block Digestor. Journal of AOAC INTERNATIONAL. 59(1). 98–100. 432 indexed citations breakdown →
11.
Isaac, Robert A & William C. Johnson. (1975). Collaborative Study of Wet and Dry Ashing Techniques for the Elemental Analysis of Plant Tissue by Atomic Absorption Spectrophotometry. Journal of AOAC INTERNATIONAL. 58(3). 436–440. 181 indexed citations
12.
Jones, J. Benton & Robert A Isaac. (1972). Determination of sulfur in plant material using a Leco Sulfur Analyzer. Journal of Agricultural and Food Chemistry. 20(6). 1292–1294. 44 indexed citations
13.
Jones, J. Benton & Robert A Isaac. (1969). Comparative Elemental Analyses of Plant Tissue by Spark Emission and Atomic Absorption Spectroscopy. Agronomy Journal. 61(3). 393–394. 26 indexed citations
14.
Isaac, Robert A, et al.. (1966). Crystalline calmagite and a study of sulphonation effects on azo dye metal-ion indicators. Talanta. 13(7). 1003–1011. 8 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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