Determination of minute amounts of copper in milk

Conn, Lillian W.; Johnson, Arnold H.; Trebler, H. A.; Карпенко, В.

doi:10.1021/ac50093a009

Cited by 21 publications

(3 citation statements)

References 32 publications

(28 reference statements)

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“…Conn et al (15) give an excellent review of the literature up to 1935, and recommend the carbamate method following separation of copper as the sulfide.…”

Section: Survey Of Literaturementioning

confidence: 99%

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Determination of Trace Amounts of Copper

Borchardt¹,

Butler²

1957

Anal. Chem.

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“…Conn et al (15) give an excellent review of the literature up to 1935, and recommend the carbamate method following separation of copper as the sulfide.…”

Section: Survey Of Literaturementioning

confidence: 99%

“…(15) encountered difficulty due to turbidity following color development. The Biazzo method consists of ashing the sample, adding pyridine and potassium thio-i v i d u a l n o t d i r e c t l y a s s o c i a t e d w i t h s c i t e i s p r o h i b i t e d .…”

mentioning

confidence: 99%

Determination of Trace Amounts of Copper

Borchardt¹,

Butler²

1957

Anal. Chem.

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“…The xanthate method is worthless for large quantities of copper, and the less sensitive ammonia complex, to be of any value, requires a spectrophotometer. A study of Conn's (7) exhaustive survey of compounds for colorimetric copper led to the choice of Callan and Henderson's (6) reagent, sodium diethyldithiocarbamate. No literature was found pertaining to the use of this chromogenic agent for the determination of copper in aluminum alloys, but the initial success in this laboratory was sufficient to stimulate further, research, which culminated in the procedure presented in this paper.…”

Section: Inmentioning

confidence: 99%

Colorimetric Determination of Copper in Aluminum Alloys

Patridge¹

1945

Ind. Eng. Chem. Anal. Ed.

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tion to a ground-glass stoppered bottle of soft glass (boron-free glassware is preferable, if available).After one hour, the solution may be compared visually to a series of sealed standards which can remain stable indefinitely. The photoelectric colorimeter may be employed as an alternate means of estimation. The instrument is adjusted to zero with concentrated sulfuric acid in the cell and readings are taken on all solutions, including a blank determination on boron-free steel which is run simultaneously. A No. 60 filter is used. The blank reading obtained is subtracted from the sample reading. The per cent of boron is then determined by referring to a curve previously drawn from a series of standards of increasing boron content.The standards are prepared from samples of boron-free steel, to which increments of standard boric acid solution equivalent to 0.001% boron are added. (Steel samples must be used in preparing the standards, as there is a proportionate retention of boron in the hydroxide precipitate.) A blank is carried along and deducted in the usual xvay.

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Metal complexes of nitroso-chromotropic acids

Datta¹,

Ghose²

1958

Naturwissenschaften

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Determination of minute amounts of copper in milk

Cited by 21 publications

References 32 publications

Determination of Trace Amounts of Copper

Determination of Trace Amounts of Copper

Colorimetric Determination of Copper in Aluminum Alloys

Metal complexes of nitroso-chromotropic acids

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