CN106053727A - Standard curve correction method and system - Google Patents
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- CN106053727A CN106053727A CN201610378210.3A CN201610378210A CN106053727A CN 106053727 A CN106053727 A CN 106053727A CN 201610378210 A CN201610378210 A CN 201610378210A CN 106053727 A CN106053727 A CN 106053727A
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Abstract
The invention discloses a standard curve correction method and system. The method comprises the steps that in the first environment, on the basis of a plurality of concentration points of a known standard solution and a signal value corresponding to each concentration point, a standard curve of the concentration points and the signal values is built; a signal value of a certain low concentration point on the standard curve, a signal value of a certain high concentration point, a signal value of the same low concentration point under the second environment and a signal value of the same high concentration point are collected; on the basis of the signal value of the certain low concentration point, the signal value of the certain high concentration point, the signal value of the same low concentration point and the signal value of the certain high concentration point, the standard curve is corrected. According to the standard curve correction method and system, various deviation situations of the standard curve can be corrected, and accuracy and rapidity of a known sample can be tested.
Description
Technical field
The invention belongs to test and analysis technology field, particularly to bearing calibration and the system of a kind of standard curve.
Background technology
At present, analyzing test industry, generally using external standard method to determine the content of unknown sample to be tested, in test
Time, it is all the known content standard substance first testing variable concentrations (no less than 7 points), based on the known content under variable concentrations
The signal value of standard substance makes a standard curve, more at identical conditions, tests unknown sample, according to known content
Standard curve converts the content of unknown sample.In prior art, the instrument for spectral class the most generally uses this method.
In actual application, after standard curve is carried out, owing to test sample quantity is many, along with the increasing of testing time
Long, the change of temperature, the change of humidity, the change of voltage, the factor such as the drift of instrument itself, it will usually cause in same concentrations
Time this point signal value deviate with the signal value of this point on original standard curve.At this moment, this unknown sample recorded
Data, or the value converted by standard curve when being not changed in, resulted in the error of test.In order to ensure unknown sample
Test accuracy, have to again do a standard curve, re-test unknown sample, say, that at set intervals, must
Again do a set of standard curve, bring the biggest puzzlement to tester, it would be highly desirable to have a kind of energy quickly calibration standard curves shift
Method, timely fair curve deviation, to ensure the accuracy of sample test, be that vast analysis test job person is badly in need for the treatment of
The problem solved, is also analytical tool manufacturing industry urgent problem.
At present, in the test instrunment of external standard method, it is common that utilize single standard point standard curve to be corrected, the most just
Be say and finish a set of qualified standard curve after, during test unknown sample, certain interval of time, anti-survey a standard point, see with
The departure degree of primary standard curve, then be multiplied by coefficient and be corrected, ensures the accuracy of tested unknown sample after correction.
Above-mentioned single-point standard curve method has a disadvantage in that in prior art, corrects utilizing single-point standard curve
When standard curve is corrected by method, it can only be to carry out under the preferable deviation state of standard curve, say, that standard curve
Deviation can not be angle deviation, i.e. least concentration point does not deviates, and only maximum concentration point deviates.If not only standard is bent
The least concentration point of line deviates, and the high point of standard curve also deviates, and is now referred to as intersecting deviation, and primary standard is bent
Standard curve after line and deviation defines cross point C, and single-point standard curve method just cannot be to the mark that angle deviation occurs
Directrix curve is corrected, if using single-point standard curve method to be corrected angle deviation, then above the C of cross point
Signal value can be corrected, and to the signal value below the C of cross point, more correction deviation is the biggest.
Summary of the invention
It is an object of the invention to provide bearing calibration and the system of a kind of standard curve, it is possible to inclined to the angle of standard curve
From, intersect deviation, parallel offset situation, utilize the peg method of the present invention can be carried out correction, it is possible to make the mark of deviation
Directrix curve correction overlaps with the most initial standard curve, reaches to test accuracy and the rapidity of unknown sample.Utilize this
Conventional standard curve can also be recalled by two bright point curve correction methods, with 2 standard curve methods, it is possible to reach
Again the purpose of complete set standard curve is made, can be time saving and energy saving.
For achieving the above object, one aspect of the present invention provides the bearing calibration of a kind of standard curve, described method
Including: under first environment, multiple concentration point based on known standard solution and signal value corresponding to each concentration point, set up dense
Spend the standard curve of point and signal value；Gather the signal value of a certain low concentration point on described standard curve, a certain high concentration spot
Signal value and the signal value of same low concentration point under second environment and the signal value of same high concentration spot；Based on institute
State the signal value of a certain low concentration point, the signal value of a certain high concentration spot, the signal value of same low concentration point and same highly concentrated
Described standard curve is corrected by the signal value of degree point.
Wherein, based on following formula, described standard curve is corrected:
Wherein, A' represents the signal value of a certain concentration point after correction, and A is the signal value of a certain concentration point before correction,
A1 represents the signal value of a certain low concentration point, and A2 represents the signal value of a certain high concentration spot, and it is same that A1' represents under second environment
The signal value of low concentration point, A2' represents the signal value of the same high concentration spot under second environment.
Wherein, the signal value of described a certain high concentration spot is the signal value that under first environment, maximum concentration point is corresponding, second
The signal value of the same high concentration spot under environment is the signal value that under second environment, maximum concentration point is corresponding.
Wherein, the signal value of described a certain low concentration point is the signal value that under first environment, least concentration point is corresponding, second
The signal value of the same low concentration point under environment is the signal value that the least concentration point under second environment is corresponding.
Wherein, the abscissa of described standard curve is concentration point, and vertical coordinate is signal value.
Another aspect of the present invention provides the correction system of a kind of standard curve, and described system includes: standard curve
Set up module, acquisition module and correction module；Standard curve sets up module, under first environment, molten based on known standard
Multiple concentration point of liquid and signal value corresponding to each concentration point, set up the standard curve of concentration point and signal value；Acquisition module,
For gathering the signal value of a certain low concentration point on described standard curve, the signal value of a certain high concentration spot and at the second ring
The signal value of the same low concentration point under border and the signal value of same high concentration spot；Correction module, for based on described a certain
The signal value of low concentration point, the signal value of a certain high concentration spot, the signal value of same low concentration point and same high concentration spot
Described standard curve is corrected by signal value.
Wherein, described standard curve is corrected by correction module based on following formula:
Wherein, A' represents the signal value of a certain concentration point after correction, and A is the signal value of a certain concentration point before correction,
A1 represents the signal value of a certain low concentration point, and A2 represents the signal value of a certain high concentration spot, and it is same that A1' represents under second environment
The signal value of low concentration point, A2' represents the signal value of the same high concentration spot under second environment.
Wherein, the signal value of described a certain high concentration spot is the signal value that under first environment, maximum concentration point is corresponding, same
The signal value of high concentration spot is the signal value that under second environment, maximum concentration point is corresponding.
Wherein, the signal value of described a certain low concentration point is the signal value that under first environment, least concentration point is corresponding, same
The signal value of low concentration point is the signal value that the least concentration point under second environment is corresponding.
Wherein, the abscissa of described standard curve is concentration point, and vertical coordinate is signal value.
As it has been described above, pass through bearing calibration and the system of the standard curve of the present invention, it is possible to inclined to the angle of standard curve
From, intersect deviation, parallel offset situation, utilize the peg method of the present invention can be carried out correction, it is possible to make the mark of deviation
Directrix curve correction overlaps with the most initial standard curve, reaches to test accuracy and the rapidity of unknown sample.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that standard curve of the prior art occurs ideal deviation (or angle deviation)；
Fig. 2 is the schematic diagram that prior art standard curve occurs intersection deviation；
Fig. 3 is the schematic flow sheet of the bearing calibration of the standard curve of the present invention；
Fig. 4 is the schematic diagram that maximum concentration point occurs skew；
Fig. 5 is the schematic diagram that least concentration point offsets up；
Fig. 6 is the schematic diagram of the parallel offset of the present invention；
Fig. 7 is the structural representation of the correction system of the standard curve of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention of greater clarity, below in conjunction with detailed description of the invention and join
According to accompanying drawing, the present invention is described in more detail.It should be understood that these describe the most exemplary, and it is not intended to limit this
Bright scope.Additionally, in the following description, eliminate the description to known features and technology, to avoid unnecessarily obscuring this
The concept of invention.
It should be understood that Single Point Correction Method refers to, with the quality of composition to be measured or concentration as abscissa, exist with this composition
Response signal magnitude on a certain instrument is vertical coordinate, first prepares the standard specimen solution of an actual concentrations with the standard specimen of known quantity, surveys
Determine its size responding signal on instrument, find out this point in the coordinate system, utilize this point and coordinate least concentration point to make one
Straight line, the sample of other unknown content, finds the quality of its correspondence again from this straight line by the size measuring its response signal
Or concentration, thus calculate the method for component content to be measured in sample.
Fig. 1 is the schematic diagram that standard curve of the prior art occurs ideal deviation (or angle deviation).
As it is shown in figure 1, the least concentration point in Fig. 1 deviates, maximum concentration point there occurs deviation, is now standard
The preferable deviation of curve.In prior art, single-point standard curve method is only capable of the preferable deviation to standard curve and carries out school
Just, so-called preferable deviation refers to that the least concentration point of standard curve does not deviates, and only maximum concentration point deviates.
As it is shown in figure 1, use single-point standard curve method to carry out standard curve correction, before A point is standard curve deviation
Signal value, B point (with A same concentration) be standard curve deviation after signal value, correction coefficient K=A/B, with test the unknown
The signal value of sample is multiplied by K, the signal value after being corrected.It is corrected by single-point standard curve method, it is to avoid weight
Newly do a whole set of standard curve, can effectively improve the work efficiency analyzing tester.
Fig. 2 is the schematic diagram that prior art standard curve occurs intersection deviation.
As in figure 2 it is shown, the least concentration point for standard curve deviates, the maximum concentration point of standard curve also occurs
The situation of deviation, single-point standard curve method is the most helpless.There is deviation and standard in the least concentration point of standard curve
The maximum concentration point of curve deviates, and is now referred to as intersecting deviation.For there is to intersect the standard curve deviateed, if still adopting
It is corrected with single-point standard curve method, then there will be and be positioned at the signal value above the C of cross point and can be corrected, be positioned at
The signal value of the lower section in cross point, more correction deviation is the biggest.
Fig. 3 is the schematic flow sheet of the bearing calibration of the standard curve of the present invention.
As it is shown on figure 3, the bearing calibration of the standard curve of the present invention, comprise the steps:
Step S1, based on the signal that the known standard solution multiple concentration point under first environment and each concentration point are corresponding
Value, sets up the standard curve of concentration point and signal value.
In this step, measure the known standard solution multiple variable concentrations points under first environment and each concentration point is corresponding
Signal value, such as, test the known standard solution 6 concentration point under first environment and 6 signal values of correspondence, by described
6 concentration point and 6 signal values indicate on standard curve, obtain the standard curve of concentration point and signal value, wherein, described mark
The abscissa of directrix curve is concentration point, and vertical coordinate is signal value.
In the present invention, it is generally the case that tester can measure 0*10-9、1*10-9、3*10-9、5*10-9、7*10-9、10*
10-96 signal values corresponding under concentration.Certainly the invention is not restricted to this, the signal value under 5 concentration can be tested, it is also possible to
Measure under other concentration corresponding signal value, say, that concentration point quantity can self-defined, concentration can also be self-defined.
In a preferred embodiment, the signal value of a certain low concentration point is the signal that under first environment, least concentration is corresponding
Value, the signal value of described a certain high concentration spot is the signal value that under first environment, maximum concentration is corresponding.Wherein, a certain low concentration point
Be concentration be the point of zero, a certain high concentration spot is the point that concentration is the highest.
Step S2, gathers the signal value of a certain low concentration point on described standard curve, the signal value of a certain high concentration spot
And the signal value of the same low concentration point under second environment and the signal value of same high concentration spot.
In this step, after standard curve is carried out, gather the signal value of a certain low concentration point on described standard curve, a certain
The signal value of high concentration spot, after certain interval of time, such as 20 minutes, interval, then gather known standard solution under second environment
The signal value of same low concentration point and the signal value of same high concentration spot, wherein, described a certain low concentration point with described with
The concentration of 1 low concentration point is identical, and described a certain high concentration spot is identical with the concentration of same high concentration spot.
Here, first environment and second environment refer respectively to the environment residing for known standard solution, first environment and second
The difference of environment is that the time is different, temperature is different, humidity difference, voltage difference etc..
In a preferred embodiment, the signal value of the same low concentration point under second environment is minimum under second environment
The signal value that concentration is corresponding, the signal value of the same high concentration spot under second environment is that under second environment, maximum concentration point is corresponding
Signal value.Wherein, same low concentration point is identical with the concentration of a certain low concentration point, each means the point that concentration is zero, same highly concentrated
Degree point is identical with the concentration of a certain high concentration spot, each means the point that concentration is the highest.
In the present invention, the difference of the signal value of the signal value of a certain low concentration point and same low concentration point: a certain low concentration
The signal value of point is the signal value that concentration is zero correspondence recorded under first environment, and same low concentration point is under second environment
The concentration recorded is the signal value of zero correspondence；The difference of the signal value of the signal value of a certain high concentration spot and same high concentration spot:
The signal value of a certain high concentration spot is the signal value of the some correspondence that the concentration recorded under first environment is the highest, same high concentration spot
Signal value be the signal value that point that the concentration recorded under second environment is the highest is corresponding.Here, first environment and second is gathered
The meaning of the concentration point of environment is, after standard curve is carried out, be corrected standard curve immediately has little significance.This
Bright for problem be after standard curve is carried out, owing to test sample quantity is many, along with the growth of testing time, the change of temperature
Change, the change of humidity, the change of voltage, it will usually cause when same concentrations on the signal value of this point and original standard curve
The signal value of this point deviates, therefore after needing to be spaced the scheduled time, is corrected standard curve.
Step S3, signal value based on described a certain low concentration point, the signal value of a certain high concentration spot, same low concentration point
Signal value and the signal value of same high concentration spot described standard curve is corrected.
In this step, based on following formula, described standard curve is corrected:
Wherein, A' represents the signal value of a certain concentration point after correction, and A is the signal value of a certain concentration point before correction,
A1 represents the signal value of a certain low concentration point, and A2 represents the signal value of a certain high concentration spot, and it is same that A1' represents under second environment
The signal value of low concentration point, A2' represents the signal value of the same high concentration spot under second environment.
Signal value A obtained by test sample will be A' through formula scales, with the signal value of A' with standard curve
The concentration value that upper lookup is corresponding, has reached because offset correction produced by a variety of causes returns on primary standard curve corresponding
Concentration point, it is ensured that analyze test accuracy.
It addition, following several deviations can be corrected by the present invention:
The first is that maximum concentration point offsets, maximum concentration point generation skew include maximum concentration point offset downward and
The situation that maximum concentration point offsets up, as shown in Figure 4.
The second is that least concentration point offsets, as shown in Figure 5.
The third is least concentration point and all offsets (parallel offset), as shown in Figure 6 with maximum concentration point.
4th kind is to offset previously mentioned the intersection, i.e. least concentration point offsets up, and maximum concentration point offsets downward, as
Shown in Fig. 2.
As it has been described above, describe the bearing calibration of the standard curve of the present invention in detail, utilize the peg method of the present invention
Can be carried out correction, it is possible to the multiple deviation situation of standard curve is corrected, make the standard curve of deviation correct with former
Carry out initial standard curve to overlap, reach to test accuracy and the rapidity of unknown sample.
Fig. 7 is the structural representation of the correction system of the standard curve of the present invention.
As it is shown in fig. 7, the correction system of the standard curve of the present invention, comprising: standard curve is set up module 10, is gathered mould
Block 20, correction module 30.
Standard curve sets up module, for based on the known standard solution multiple concentration point under first environment and each dense
The signal value that degree point is corresponding, sets up the standard curve of concentration point and signal value.Wherein, the abscissa of standard curve is concentration, vertical
Coordinate is signal value.
Acquisition module 20 is set up module 10 with described standard curve and is connected, a certain low for gather on described standard curve
The signal value of concentration point, the signal value of a certain high concentration spot and the signal value of the same low concentration point under second environment and
The signal value of same high concentration spot.
In the present invention, the signal value that under the signal value position first environment of a certain low concentration point, least concentration is corresponding is same low
The signal value of concentration point is the signal value that the least concentration under second environment is corresponding；The signal value of described a certain high concentration spot is
The signal value that under one environment, maximum concentration is corresponding, the signal value of same high concentration spot is the letter that under second environment, maximum concentration is corresponding
Number value.
Correction module 30 is connected with described acquisition module 20, for signal value based on described a certain low concentration point, a certain
Described standard curve is entered by the signal value of the signal value of high concentration spot, the signal value of same low concentration point and same high concentration spot
Row correction.
Concrete, described standard curve is corrected by correction module 30 based on following formula:
Wherein, A' represents the signal value of a certain concentration point after correction, and A is the signal value of a certain concentration point before correction,
A1 represents the signal value of a certain low concentration point, and A2 represents the signal value of a certain high concentration spot, and it is same that A1' represents under second environment
The signal value of low concentration point, A2' represents the signal value of the same high concentration spot under second environment.
As it has been described above, describe the correction system of the standard curve of the present invention in detail, utilize the peg method of the present invention
Can be carried out correction, it is possible to the multiple deviation situation of standard curve is corrected, make the standard curve of deviation correct with former
Carry out initial standard curve to overlap, reach to test accuracy and the rapidity of unknown sample.Utilize the two point curve schools of the present invention
Execute and conventional standard curve can also be recalled, with 2 standard curve methods, it is possible to reach again to make a set of complete
The purpose of whole standard curve, can be time saving and energy saving.
As it has been described above, describe bearing calibration and the system of the standard curve of the present invention, the two point correction of the present invention in detail
Standard curve deviation method, can correct ideally standard curve deviation (standard curve initial point without departing from, be only higher than
The concentration point of initial point deviates), it is also possible to correct the standard curve deviation of any change.And cover single point correction standard
The function of the curve method skew of standard curve under calibration standard state (can only), solves analysis tester because during test
Between prolongation, the change of temperature, the change of humidity, the test error that the factor such as change of voltage is caused.Avoid and occurring
After needing to readjust instrument parameter and again make a set of standard curve during the change of any situation, just can obtain accurately
The situation of Example Test Data, the most time-consuming but also take a lot of work.
It should be appreciated that the above-mentioned detailed description of the invention of the present invention is used only for exemplary illustration or explains the present invention's
Principle, and be not construed as limiting the invention.Therefore, that is done in the case of without departing from the spirit and scope of the present invention is any
Amendment, equivalent, improvement etc., should be included within the scope of the present invention.Additionally, claims purport of the present invention
Whole within containing the equivalents falling into scope and border or this scope and border change and repair
Change example.
Claims (10)
1. the bearing calibration of a standard curve, it is characterised in that described method includes:
Under first environment, multiple concentration point based on known standard solution and signal value corresponding to each concentration point, set up dense
Spend the standard curve of point and signal value；
Gather the signal value of a certain low concentration point on described standard curve, the signal value of a certain high concentration spot and at the second ring
The signal value of the same low concentration point under border and the signal value of same high concentration spot；
Signal value based on described a certain low concentration point, the signal value of a certain high concentration spot, same low concentration point signal value with
And described standard curve is corrected by the signal value of same high concentration spot.
Method the most according to claim 1, wherein, is corrected described standard curve based on following formula:
Wherein, A' represents the signal value of a certain concentration point after correction, and A is the signal value of a certain concentration point before correction, A1 table
Showing the signal value of a certain low concentration point, A2 represents the signal value of a certain high concentration spot, and it is same low dense that A1' represents under second environment
The signal value of degree point, A2' represents the signal value of the same high concentration spot under second environment.
3. according to the method described in any one of claim 1-2, wherein, the signal value of described a certain high concentration spot is first environment
The signal value that lower maximum concentration point is corresponding, the signal value of same high concentration spot is the signal that under second environment, maximum concentration point is corresponding
Value.
4. according to the method described in any one of claim 1-2, wherein, the signal value of described a certain low concentration point is first environment
The signal value that lower least concentration point is corresponding, the signal value of same low concentration point is the letter that the least concentration point under second environment is corresponding
Number value.
5. according to the method described in any one of claim 1-2, wherein, the abscissa of described standard curve is concentration point, vertical seat
It is designated as signal value.
6. the correction system of a standard curve, it is characterised in that described system includes:
Standard curve sets up module (10), under first environment, and multiple concentration point based on known standard solution and each
The signal value that concentration point is corresponding, sets up the standard curve of concentration point and signal value；
Acquisition module (20), for gathering the signal value of a certain low concentration point on described standard curve, a certain high concentration spot
Signal value and the signal value of the same low concentration point under second environment and the signal value of same high concentration spot；
Correction module (30), for signal value based on described a certain low concentration point, the signal value of a certain high concentration spot, same low
Described standard curve is corrected by the signal value of concentration point and the signal value of same high concentration spot.
System the most according to claim 6, wherein, correction module (30) carries out school based on following formula to described standard curve
Just:
Wherein, A' represents the signal value of a certain concentration point after correction, and A is the signal value of a certain concentration point before correction, A1 table
Showing the signal value of a certain low concentration point, A2 represents the signal value of a certain high concentration spot, and it is same low dense that A1' represents under second environment
The signal value of degree point, A2' represents the signal value of the same high concentration spot under second environment.
8. according to the system described in any one of claim 6-7, wherein, the signal value of described a certain high concentration spot is first environment
The signal value that lower maximum concentration point is corresponding, the signal value of the same high concentration spot under second environment is maximum concentration under second environment
The signal value that point is corresponding.
9. according to the system described in any one of claim 6-7, wherein, the signal value of described a certain low concentration point is first environment
The signal value that lower least concentration point is corresponding, the signal value of the same low concentration point under second environment is minimum dense under second environment
The signal value that degree point is corresponding.
10. according to the system described in any one of claim 6-7, wherein, the abscissa of described standard curve is concentration point, vertical seat
It is designated as signal value.
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| CN114019114A (en) * | 2022-01-06 | 2022-02-08 | 深圳普门科技股份有限公司 | Standard curve generation method and device, analysis equipment and readable storage medium |
| CN114780905A (en) * | 2022-06-21 | 2022-07-22 | 四川大学华西医院 | Determination method and device for comparison sample, storage medium and electronic equipment |
| CN114780905B (en) * | 2022-06-21 | 2022-09-13 | 四川大学华西医院 | Determination method and device for comparison sample, storage medium and electronic equipment |
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