Report detailing the analytical methods and results of a study designed to measure the total alpha particle activity of samples. The method being used was previously in use at Columbia University. The report recognizes potential for grave errors, but makes no effort to minimize the effect of the roughness of the sample.

From introduction: This report describes some preliminary electro-conductometric titrations which were made in order to ascertain whether the method [for selecting the best complexing agent for any problem that may arise] gave interpretable results.

Abstract: An air-water-abrasive blasting system thoroughly cleans copper parts of E units without damage to the parts. Little abrasive is required because of the continuous recycle of the abrasive slurry.

A report about the ongoing work regarding density. Attention was directed toward the accurate ascertainment of the T losses involved in a process in which the partially dried peroxide is transferred from the sintered glass funnels to the gold boats, and in which the calcination is male from TO4 to T3OE under nitrogen in the green salt reactors.

Abstract: The well known colorimetric method for determining cadmium by means of dithizone has been reinvestigated and found applicable to solutions containing interfering ions much as are found in the plant. Copper, however, must be removed prior to using this analytical procedure.

The following report discusses a colorimetric method for molybdenum involving the reaction between a molybdate, thiocynate, and some reducing agent, usually SnCL2, that has been in use in the steel industry for some time.

The following report describes how to determine the colorimetric of titanium in the presence of the T complex.

"The following investigation was carried out to device a suitable method for determining trace amounts of vanadium in tuballoy compounds, primarily with respect to green salt (TF4)."

Abstract: "The etherate of tubanyl nitrate and dibutyl carbitol has been isolated and characterized."

Abstract: "An instrument is described which makes use of a standard watthour meter in conjunction with an amplifier to register the time integral of a varying voltage. When a suitable current shunt is used as the input element, the instrument becomes a direct-reading coulombmeter. In any of its applications the instrument is accurate to plus or minus two per cent."

The following report is meant to be used as a guide for planning and interpreting future distribution experiments of tubanyl salts between organic solvents and aqueous solutions.

This report is part of a series of reports made during a series of investigations to determine the characteristics of nitric acid-dibutyl carbitol mixtures in the plant. In this report, distribution coefficients are given for various combinations of nitric acid-dibutyl carbitol.

Introduction: "In this series of experiments a study of the distribution coefficients was made for the dibutyl carbitol-nitric acid system in the range of 1 to 5 normal nitric acid to establish more closely the break in distribution coefficients, found previously, when the acid concentration was increased from 2 to 4 normal. The study was then continued by adding various salting-out agents to the system. It was found that salting-out agents produce a great effect; in fact, they reverse the previously found curves. Although the break occurs in the same place, the more dilute (instead of the more concentrated) the nitric acid, the greater the distribution coefficient of the system."

Abstract: "In the low temperature precipitation of tubanyl peroxide from Beta gunks, process modifications are described which minimize the effect of iron on decompisition of H2O2. These include the addition of excess H2O2 to the slurry only after attaining a reduced temperature, the use of malonic and acetic acid complexing when the H2O2 is added at room temperature, and the use of wetting agents when the entire process is carried out at 2 C."

Introduction: "This meeting was called by Mr. S. H. Smiley in order to review progress made on the corrosion problem since the last meeting on September 5th, and to devise a definite program on the specific problem of the corrosion of the coolant coolers. The minutes of the last meeting were reviewed briefly and it was pointed out that neither the corrosion of the water piping nor the hot water tanks presented any immediate concern. The chief concern then is with the excessive pitting of the cooler shells as disclosed in E.T.4I's. reports on those coolers which were removed for inspection."

Summary: "By use of infrared spectroscopy come of the impurities in n-hexadecafluoroheptane and hexadecafluorodimethylcyclohexane have been identified and accurate specification analyses have been devised for measuring these impurities. These infrared analytical methods were used as an aid in setting acceptance specifications on the materials and for determining whether production materials met specifications."

Summary: "Four infrared gas analyzers have been built for determining the amount of fluorocarbon vapor in air in the range 10-1000 ppm by volume."

This paper is based off of an operation of a recording tape scaler, which records pulses from a counter or scaler upon a tape as a function of time. With the recording tape scaler, the interval between pulses of counter or scaler is measured in this report.

Abstract: "A monel metal rod mill has been designed, built, and tested for grinding five hundred gram batches of anhydrous tuballoy tetrafluoride to a fineness such that one hundred per cent will pass an eighty mesh screen; the grinding being accomplished without loss of material, and with the addition of less than two hundred parts per million of contaminating metals. The grinding time per batch is not more than fifty minutes."

Abstract: "A rapid colorimetric method for the determination of traces of tellurium (20-100[gamma]) depending upon the color of a colloidal suspension of the metal has been developed. It is accurate to 2-3%. Only those ions interfere which form insoluble chlorides or which are reduced to the elemental state by stannous chloride. The time required for a complete analysis is 10-15 minutes."

"This report is based on work done at the University of Notre Dame under the auspice of the Manhattan District under contract No. W-7405-Eng-49." This report discusses the operation and purpose of the positive ion gun for the Notre Dame's Van de Graaf-herb generator

Abstract. thorium can be precipitated as a salt of p-dimethylaminoazophenylarsonic acid at a pH of about 1.5. the precipitate, collected on a sintered glass filter is washed with dilute ammonium hydroxide to dissolve the dye. the amount of thorium is determined by measuring the concentration of the dye spectrophotometrically at a wavelength of 450 millimicrons. Zirconium, which interferes, can be separated and determined using the same reagent in strong hydrochloric. the behavior of thorium metal upon treatment with various acids and upon fusion withKHSO4 is described. three satisfactory procedures are given for dissolving the metal with sulfuric acid, phosphoric acid, and by a potassium hydrogen sulfate fusion. The laboratory was presented with the problem of analyzing for a large number of elements in O2 metal. the results of a systematic study of methods for effecting solution of the metal are offered here since they may be of some interest and use to other laboratories. The four methods which effected complete solution of the metal are (1) Sulfuric acid method; (2) Fusion method; (3) Phosphoric acid method; and (4) Nitric acid-hydrofluoric acid method.

Summary: "Carbides of Th, Ta, Be, and Zr have been prepared from the oxides of these metals by reaction with graphite in the induction furnace. Methods for the analysis of these compounds are given."

Summary: The controlled decomposition of the TCl₅ was carried out in an electric furnace at furnace temperatures varying from 114° to 550°C. The results indicate that chlorine evolution is noticeable when the TCl₅ temperature is about 75°C. The rate of reaction increases rapidly at a TCl₅ temperature of 175°C. Thus the possibility of TCl₅ existing at a very high temperature becomes uncertain. The TCl₄ prepared at the low temperatures (up to 300°) was obtained as a micro crystalline powder while those products allowed to heat at 400°-500° had a characteristic crystalline appearance.