The Application of Statistics to Quantitative Analysis

Benedetti-Pichler, A. A.

doi:10.1021/ac50103a028

Cited by 16 publications

(5 citation statements)

References 7 publications

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“…chemists have always used simple statistics l such as the mean (arithmetic average) and mean deviation (arithmetic average of deviations from their mean) to summarize their test results (10). In recent years, they have begun to use some of the statistical methods that were developed by research workers in the fields of agriculture, biology, and medicine.…”

Section: Analyticalmentioning

confidence: 99%

Statistics Applied to Analysis

Wernimont¹

1949

Anal. Chem.

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or some simple mathematical function thereof. Selsyns, rotatable transformers, and related devices are important electrical computer elements. The versatility of electromechanical devices such as stepping relays or rotary switches is likely to be overlooked unless we recall their data-assimilating ability in the modern dial telephone system. Very useful computers can be assembled from electrical components. They may be adjusted manually to arrive at a numerical answer.Automatic adjustment may be arranged for, in which case the attainment of a solution results in a "zero" error signal and the automatic adjusting mechanism comes to rest.Electronic circuits have inherent computing possibilities notably in counting. Other possibilities include addition, subtraction, multiplication and division, exponential functions, and differentiation and integration. A high degree of precision is rarely attained if one depends upon electron tube characteristics; but circuits can be designed in which dependence upon tube characteristics is minimized.In taking full advantage of the best features of each class of computing element, it is not surprising to find that the more elaborate computers employed in navigation, gun laying, etc., usually employ all three methods, wherein a few simple mechanical elements are to be found which provide high precision electrical components, because of their versatility and flexibility and electronic components for their high sensitivity and almost complete lack of inertia. The net result is again a servomechanism which, because it is required to do very little heavy work, is designated as a computer-servo.There is, perhaps, some irony in the situation; although some of the benefits and advantages of instrumental methods of analysis are still being questioned, there is ample evidence that in some measurements, data can be accumulated more rapidly than they can be assimilated. LITERATURE CITED i'l) Becker, Green, and Pearson, Proc. Am. Inst. Elect. Engr. (May 28, 1946).(2) Bode, H. W., "Network Analysis and Feedback Amplifier Design," New York, D.

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Section: Analyticalmentioning

confidence: 99%

Statistics Applied to Analysis

Wernimont¹

1949

Anal. Chem.

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“…Equation (3) shows that the error in units of weight or mass deereases in direet proportion to the weight of the pieces as one proeeeds from the permanent standard down to the smaller weights. If the "true" mass of the permanent standard of 100-g weight should be in error for 0,1 mg, the error of the 10-g ]?ieee will be only 0,01 mg, that of the 1-g piece only 0,001 mg, and for the ffactional grams the error will be truly insignifieant.…”

Section: The Aeeuraey Of the Correetionsmentioning

confidence: 99%

“…The identity of A« and 71 has been already stated in equation (3). The identity of A« and 71 has been already stated in equation (3).…”

Section: The Precision Of the Calibrationmentioning

confidence: 99%

Accuracy and precision of Richards' method for the calibration of weights

Benedetti-Pichler

1949

Mikrochim Acta

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“…A number of investigators (2,3,5,6) have indicated that the variations of an analytical method may be treated by statistical calculations. Power (6) found that over 100 determinations had to be made before the variability of a micromethod for carbon could be accurately estimated.…”

Section: Prior Conceptsmentioning

confidence: 99%

Determination of Precision of Analytical Control Methods

Moran¹

1943

Ind. Eng. Chem. Anal. Ed.

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The Application of Statistics to Quantitative Analysis

Cited by 16 publications

References 7 publications

Statistics Applied to Analysis

Statistics Applied to Analysis

Accuracy and precision of Richards' method for the calibration of weights

Determination of Precision of Analytical Control Methods

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