The suppression of cyanogen bands from direct current arc spectra by using atmospheres of argon, helium, and carbon dioxide, and binary mixtures of these gases with oxygen has been investigated. Analytical working curves for the determination of dysprosium, thulium, and holmium in erbium oxide have been prepared from spectra of samples arced in an atmosphere of 80% argon – 20% oxygen. Cyanogen bands were eliminated to permit the use of sensitive lines in these regions; background intensity was also reduced.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpectrophotometric Determination of One Component in Two-Component MixtureEugene Allen and E. M. HammakerCite this: Anal. Chem. 1952, 24, 8, 1295–1298Publication Date (Print):August 1, 1952Publication History Published online1 May 2002Published inissue 1 August 1952https://pubs.acs.org/doi/10.1021/ac60068a008https://doi.org/10.1021/ac60068a008research-articleACS PublicationsRequest reuse permissionsArticle Views119Altmetric-Citations3LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAlphazurine G and Some N,N'-Substituted Benzidines as Redox IndicatorsR. N. Adams and E. M. HammakerCite this: Anal. Chem. 1951, 23, 5, 744–746Publication Date (Print):May 15, 1951Publication History Published online1 May 2002Published inissue 15 May 1951https://pubs.acs.org/doi/10.1021/ac60053a018https://doi.org/10.1021/ac60053a018research-articleACS PublicationsRequest reuse permissionsArticle Views51Altmetric-Citations3LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpectrographic Determination of Trace Elements in SilicaJ. M. Hustler and E. M. HammakerCite this: Anal. Chem. 1949, 21, 8, 919–921Publication Date (Print):August 13, 1949Publication History Published online1 May 2002Published inissue 13 August 1949https://pubs.acs.org/doi/10.1021/ac60032a008https://doi.org/10.1021/ac60032a008research-articleACS PublicationsRequest reuse permissionsArticle Views21Altmetric-Citations3LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

DEODORIZATION produced no appreciable increase in the stability of steam-rendered lard but significantly increased the stability of kettlerendered lard. A substantial increase in the stability of lard was produced by tocopherol, regardless of whether it was added as a pure compound, as a concentrate, or as a tocopherol-bearing oil. Accelerated tests showed that this increase was more than doubled when small amounts of synergists also were added. Deodorization of the lard prior to addition of the synergistic antioxidant compositions produced even greater stability.

Commercial petroleum sulfonic acid reagents have been compared with Twitchell reagents, alkylarylsulfonic acids, and sulfoarylstearic acids as fat-splitting reagents in the hydrolysis of lard oil, tallow, cotton-seed oil, garbage grease, and inedible grease. The best reagents were made from commercial wetting agents of the alkylarylsulfonate type. Sulfoxylylstearic acid, seven petroleum sulfonic acids, and four Twitchell reagents followed in decreasing order.