摘要:

The styrene content of copolymers with aliphatic acrylates and methacrylates is determined by near-infrared absorption measurements in chloroform at 2.144μ. The plot of absorbance vs. concentration is linear over the range 0 to 82.1 g./1.

ISSN:0003-2719    

DOI:10.1080/00032716908051281

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

摘要:

A half wave potential-pH diagram for the parabenzoquinone system has been obtained by the use of potentiometry, voltammetry and polarography in buffered N,N-dimethylformamide media. Acid-base and redox reactions are considered and the study is completed by the use of spectrophotometry.

ISSN:0003-2719    

DOI:10.1080/00032716908051282

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

摘要:

Optimum conditions for the determination of silicon by flame emission spectrometry were ascertained. The maximum signal emanates from a region immediately above the tip of the inner cone of a fuel-rich oxygen-acetylene flame. The organosilicon compound is aspirated as a solution in ethanol and the emission intensity at 2516.1 Å is measured. Quantitative determinations were made using a working curve and by the method of standard addition. Detection limit is 3.5 μg/ml.

ISSN:0003-2719    

DOI:10.1080/00032716908051283

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

摘要:

The complex formed between molybdenum(VI) and benzoylacetanilide in the pH range 0.6 and 1.9 has been extracted into methyl isobutyl ketone and the absorbance has been measured at 410 mμ. Quantities of 0.15 to 2.10 mg of molybdenum have been determined with a standard deviation of 0.6%. The color is stable up to 2 hours. The presence of Co2+, Ni2+, Zn2+, Mn2+, Be2+, Al3+, Cr3+, Ce4+, Th4+or UO2+2up to 100 μg causes no interference. Ordinarily, Fe3+interferes with the determination, but when masked with 1 ml of 0.5% solution of ascorbic acid the tolerance limit is 10 mg. Thus, molybdenum can be determined in steel when present in amounts as low as 0.26%.

ISSN:0003-2719    

DOI:10.1080/00032716908051284

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

摘要:

The behaviour of HCl in molten NaCl-KCl eutectic at 800[ddot]C is investigated by means of I.R. spectrometry and titrimetry.

ISSN:0003-2719    

DOI:10.1080/00032716908051285

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

摘要:

A fast photokinetic method for the determination of Fe(III) is reported, which employs photoreduction of Fe(III),in situcomplexation of the Fe(II) produced, and continuous recording of the absorbance of the colored complex. Complete photoconversion is not necessary; the total photolysis time is approximately one minute. Linear calibration plots were obtained using the initial slope method over the range 2 to 10 micromoles of Fe(III) with relative standard deviation of 1.5%.

ISSN:0003-2719    

DOI:10.1080/00032716908051286

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0003-2719    

DOI:10.1080/00032716908051280

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor