Discussion on superseding working curve method using one-point external standard method in quantitative analysis;

Discussion on some problems of the applying work curves in laboratory test;

Drawing work curve, digesting time and turbidity compensated are tested as determining total amount of P in surface water by ammonium molybdate tetrahydrate spectrophotometry.

The correction coefficient needs to be adopted to calculate the determinated value of work curve,it simplifies the operation,reduces error and enhances the accuracy and precision.

By trial and research,a set of SAE1141 standard specimens were developed and a constant performance curve was given.

Through inspection service comparing with the similar equipments precision of overseas companies, such as Spectro and ARL ect, the results show that the performance curve of DF-100 direct-reading spectrometer satisfies long-term use and doesn t need to be re-draw.

The fuchsin-sodium sulfite photometric method was used for the determination of methonal in the liquor, the working curve between the methonal concentration and the absorbence dose not appear linearity relationship while in the low methonal concentration(<0.

Satisfactory results are obtained with self-designed working curve,type standard and controlled samples.

Aluminum sample with higher content of ferrum measured by ammonium thiocyanate colorimetry could be added to working curves of aluminum ferrum in sending spectrum by combining ammonium thiocyanate colorimetry .

Describing Working Curves of Equipment Analysis in Excel;

Optical output characteristics of liquid crystal light valve are closely related with its working curves.