Search result: HJ 609-2019 (HJ 609-2011 Older version)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| HJ 609-2019 | English | 349 |
Add to Cart
|
4 days [Need to translate]
|
Technical specifications and test procedures for water quality on-line automatic monitoring equipment of chromium (VI)
| Valid |
HJ 609-2019
|
| HJ 609-2011 | English | 120 |
Add to Cart
|
0--9 seconds. Auto-delivery
|
The Technical Requirement for water Quality Automatic On-line Monitor of Chromium(VI)
| Obsolete |
HJ 609-2011
|
| Standard ID | HJ 609-2019 (HJ609-2019) | | Description (Translated English) | Technical specifications and test procedures for water quality on-line automatic monitoring equipment of chromium (VI) | | Sector / Industry | Environmental Protection Industry Standard | | Classification of Chinese Standard | Z16 | | Classification of International Standard | 13.060 | | Word Count Estimation | 15,194 | | Date of Issue | 2019 | | Date of Implementation | 2020-03-24 |
S xx
n
(2)
SLOQ 10 (3)
In the formula. S--7 standard deviation of measured value, mg/L;
n--number of measurements;
ix-the i-th measured value, mg/L;
x--average value of standard solution measurement, mg/L;
LOQ--lower limit of quantification, mg/L.
5.5.3 Precision
The instrument measures a standard solution with a concentration value of 50% of the upper limit of the detection range. It measures 6 times continuously and calculates the phase of the 6 measured values.
Regarding the standard deviation, the relative standard deviation is used as the determination value of precision. The calculation method is shown in formula (4).
7
00% 1
xx
(4)
In the formula. Sr-precision of the instrument,%;
n--number of measurements;
ix-the i-th measured value, mg/L;
x--The average value of the measured value of the standard solution, mg/L.
5.5.4 Zero drift
A standard solution with a concentration value of the lower limit of the detection range is used for continuous measurement for 24 hours. The average value of the previous three measurements is
Initial measurement value, calculate the percentage of the maximum change between the subsequent measurement value and the initial measurement value with respect to the upper limit of the detection range
rate. The calculation method is shown in formulas (5) and (6).
Number of data. a total of 24 x1, x2, x3x24.
I i iZ x C (5)
100%
ΔZ
ZD max (6)
In the formula. iZ-absolute error of the i-th measured value relative to the standard solution concentration value, mg/L;
ix-the i-th measured value, mg/L;
C-initial measured value of standard solution, mg/L;
ZD-zero drift of the instrument,%;
maxZ-the maximum value of the absolute error of the i-th measured value relative to the standard solution concentration value, mg/L;
A--Upper limit of detection range, mg/L.
5.5.5 Span Drift
A standard solution with a concentration value of 80% of the upper limit of the detection range is used for continuous measurement for 24 hours, and the average of the previous three measurements is taken.
Is the initial measurement value, and calculates the percentage of the maximum change between the subsequent measurement value and the initial measurement value with respect to the upper limit of the detection range
rate. The calculation method is shown in formulas (7) and (8).
(9)
In the formula. V-relative error caused by voltage change,%;
X-average value of 3 measurements under the working voltage of 242 V, mg/L;
W-the average value of 3 measurements under the initial voltage of 220 V, mg/L;
Y--The average value of 3 measurements under the working voltage of 198 V, mg/L.
5.5.7 Ambient temperature stability
Place the instrument in a constant temperature room and measure a standard solution with a concentration value of 80% of the upper limit of the detection range.
Measurement results after 5 h at 5 ° C, 20 ° C, 40 ° C, and 20 ° C for 3 h. 3 times of measured value at 20 ℃
The average value is a reference value, and the relative error between the first measurement value and the reference value under the conditions of 5 ° C and 40 ° C is calculated according to formula (10).
Difference, take the maximum value of relative error as the judgment value of the stability of the instrument's ambient temperature. See calculation formula (10).
1 100%
t X XW
And 2 100%
t X XW
(10)
Where. tW-environmental temperature stability,%;
The first measurement value at 1X --5 ℃, mg/L;
X-the average value of three measurements at 20 ° C, mg/L;
2X-the first measurement under 40 ℃, mg/L.
5.5.8 Ion interference
Mix the interference ions specified in Table 2 into mixed interference ions and add them to the standard solution. After adding, in the mixed solution
The concentration of interfering ions should meet the requirements of Table 2. The concentration of hexavalent chromium ions is 50% of the upper limit of the detection range. Instrument continuous measurement
Measure the hexavalent chromium ion concentration of the mixed solution three times, calculate the indication error of the three measurements, and take the maximum value of the indication error as
It is the judgment value of instrument ion interference.
100% is
DD
(11)
In the formula. D-ion interference,%;
iD-Mean value of 3 measurements of standard solution containing interfering ions, mg/L;
sD-concentration value of standard solution, mg/L.
9 Table 2 Interfering ions and their concentrations
Interfering ion concentration (mg/L)
Trivalent chromium 3.0
Total nickel 2.0
Total cadmium 0.2
Total lead 2.0
Total copper 4.0
Total zinc 10.0
Trivalent iron 10.0
Total aluminum 10.0
Total Manganese 10.0
5.5.9 Memory Effect
After the instrument continuously measures the standard solution whose concentration value is 20% of the upper limit of the detection range 3 times (the test results are not evaluated), and then
Measure the standard solutions with concentration values of 80% and 20% of the upper limit of the detection range three times each, and calculate the two standard solutions.
The indication error T of the measured value at one time, the larger value of the indication error is taken as the judgment value of the memory effect of the instrument.
100%
x C
(12)
twenty two
100%
x C
(13)
Where. T-memory effect;
The first measurement value of 1x --20% standard solution, mg/L;
Concentration value of 1C-20% standard solution, mg/L;
2x --20% standard solution first measurement value, mg/L;
Concentration value of 2C --80% standard solution, mg/L.
5.5.10 Comparison of actual water samples
Choose three kinds of actual water samples, whose concentrations range from low to high, and basically cover the detection range of the instrument, using the instrument and the national environment, respectively.
Monitoring and analysis method standard (GB 7467 or HJ 908) for measurement, each water sample should be measured no less than 15 times by instrument,
The number of measurements using the national environmental monitoring and analysis method should be no less than three, and each actual water sample measurement should be calculated at different concentration intervals.
The absolute value of the absolute value or the absolute value of the relative error between the fixed value and the average value of the national environmental monitoring analysis method
The average value is used to determine the detection error of the actual water sample comparison of the instrument. The calculation method is shown in formulas (14) and (15).
x B
| |
(14)
x B
nB
| |
100%
(15)
In the formula. A-the average of the absolute value of the error of the actual water sample or the average of the absolute value of the relative error, mg/L or%;
ix-the i-th measured value, mg/L;
B--The average value of the water sample measured by the national environmental monitoring analysis method standard, mg/L;
n--the number of times that each water sample is measured by an instrument.
5.5.11 Minimum maintenance intervals and data efficiency
The instrument performs continuous measurement on the water sample, timing from the start of the measurement, and does not perform any manual labor on the instrument during the measurement.
Maintenance (including replacing reagents, calibrating instruments, repairing instruments, etc.) until the instrument fails to maintain a normal measurement state or continues 3
The relative error of the two measurements exceeds ± 10%, and the total running time (h) recorded is the minimum maintenance interval of the instrument. During this period
The data efficiency of the instrument should reach more than 90%, and the data validity rate is the ratio of the number of valid data to the number of all data.
The calculation method is shown in formula (16).
0
D (16)
In the formula. D--effective data rate,%;
eD-number of valid data;
tD-the number of all data.
5.5.12 Consistency Deviation
The instrument continuously measures water samples and obtains at least 168 sets of data. The data obtained from three instruments of the same model are extracted.
Ci, j (where i is the instrument number and j is the period number), calculate the phase of the test data of the three instruments in the jth period according to formula (17)
For the standard deviation CMj, the consistency deviation CM of the data is calculated according to formula (18).
,,
100%
tt
ijij
jt
ij
CC
tt
CM
(17)
2
CM
CM
(18)
In the formula. jCM-the relative standard deviation of the test data of three instruments in the j-th period,%;
t--the number of instruments;
, i jC-data for the j period of the i-th instrument, i jC, where i = 1, 2, 3, j = 1, 2, 3 ,, mg/L
CM-consistency deviation,%;
m--the number of data sets of the instrument.
Note. when
When jCM> 10%, CM> 10%.
6 Random data
The random information such as the instrument manual should include at least the following. instrument principle, instrument structure diagram, test flow chart,
Site installation conditions and methods, instrument operation methods, component identification and precautions, toxic and hazardous items (components) warning labels
Identification, reagent preparation method and use method, common fault treatment, waste liquid disposal method, daily maintenance instructions, etc.
......
HJ 609-2011
HJ
NATIONAL ENVIRONMENTAL PROTECTION STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
The technical requirement for water quality
automatic on-line monitor of chromium (VI)
ISSUED ON. FEBRUARY 11, 2011
IMPLEMENTED ON. JUNE 01, 2011
Issued by. Ministry of Environmental Protection
Announcement
2011 No.12
Ministry of Environmental Protection
of the People’s Republic of China
To implement “Environmental Protection Law of the People’s Republic of China”,
protect environment, guarantee human health, normalize environmental monitoring
work, now the “The technical requirement for water quality automatic on-line monitor
of chromium (VI)” is approved as national environmental protection standard, and
hereby it is issued.
The standard name and number are as follows.
The technical requirement for water quality automatic on-line monitor of chromium (VI)
(HJ 609-2011)
This Standard will be implemented from June 1, 2001, published by China
Environmental Science Press; the content of the standard can be checked on the
website of Ministry of Environmental Protection (bz.mep.gov.cn).
The notice is hereby given.
February 11, 2011
Table of Contents
Announcement ... 2
Foreword ... 4
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 5
4 Method principle and measuring range ... 6
5 Performance index and test method ... 7
6 Technical requirements ... 10
7 Operating instructions ... 12
Foreword
To implement “Environmental Protection Law of the People’s Republic of China” and
“Water Pollution Prevention Law of the People’s Republic of China”, normalize the
technical performance for water quality automatic on-line monitor of chromium (VI),
improve the ability of water environment monitoring, this Standard is formulated.
This Standard specifies the performance, test method and technical requirement for
water quality automatic on-line monitor of chromium (VI).
This Standard was first-time released.
This Standard was organized and formulated by Ministry of Environmental Protection -
Department of Science, Technology and Standard.
Drafting organizations of this Standard. China Leather and Footwear Industry
Research Institute, Beijing Technology and Business University, Universtar Science
and Technology (Shenzhen) Co., Ltd., Hangzhou Focused Photonics Environmental
Science and Technology Co., Ltd., Hunan Lihe Science and Technology Development
Co., Ltd., Yiwen Environmental Science Technology Co., Ltd., and American Hach
Company.
This Standard was approved by Ministry of Environmental Protection on February 11,
2011.
This Standard shall be implemented on June 1, 2011.
This Standard shall be interpreted by Ministry of Environmental Protection.
The technical requirement for water quality
automatic on-line monitor of chromium (VI)
1 Scope
This Standard specifies the performance, test method and technical requirement for
water quality automatic on-line monitor of chromium (VI).
This Standard applies to the production, application selection, and performance test of
automatic on-line monitor of chromium compound ion (VI) in surface water, sanitary
sewage and industrial waste water.
2 Normative references
The following documents or provisions are essential to the application of this document.
For the undated documents, the effective versions are applicable to this document.
GB 7467 Water quality - Determination of chromium (VI) - Diphenylcarbazide
spectrophotometric method
GB/T 13306 Plates
HJ 168 Environmental monitoring - Technical guideline on drawing and revising
analytical method standards
HJ/T 212 Standard for data communication of pollution emission auto monitoring
system
HJ 477 The technical requirement for data acquisition and transmission
equipment of pollution emission auto monitoring system
3 Terms and definitions
The following terms and definitions are applicable to this Standard.
3.1
Zero drift
It refers to, adopting the zero calibration solution specified in this Standard as the
sample to test continuously, in a certain period of time, the percentage OF changes of
indicated value of water quality automatic on-line monitor of chromium (VI) RELATIVE
to the measuring range.
3.2
Measuring range drift
It refers to, adopting the measuring-range calibration solution specified in this
Standard as the sample to test continuously, in a certain period of time, the
percentage OF changes of indicated value of water quality automatic on-line monitor
of chromium (VI) RELATIVE to the measuring range.
3.3
Mean time between failures
It refers to the ratio OF the total running time (hour) of water quality automatic on-line
monitor of chromium (VI) during the period of test TO the failure frequency (times),
expressed by “MTBF”, the unit is h/time.
4 Method principle and measuring range
4.1 Method principle
Water quality automatic on-line monitor of chromium (VI) can adopt
spectrophotometric method or other analytical method.
In which, the principle of spectrophotometric method. in the acid solution, chromium
compound ion (VI) and diphenylcarbazide (DPC) react and generate the purple
compound; determine the spectrophotometer at 540mm wavelength. Above steps are
automatically controlled and completed by the on-line monitor, from water-sample
importing to concentration calculation, so as to realize the automation of chromium (VI)
monitoring.
4.2 Structure of water quality automatic on-line monitor of chromium (VI)
Sampling/metering unit. includes sample, reagent importing part, and sample and
reagent metering part.
Analytical unit. has the function of changing the measured value into electric signal
output; through controlling the unit, complete the automatically on-line analysis of
samples. At the same time, it shall also include the function aimed at zero and
measuring-range calibration.
Controlling unit. includes system controlling hardware and software, with the functions
such as data collecting, processing, display storage and data output.
4.3 Measuring range
displaying part shall be uniform and clear; there shall be no vignette, black spots,
rainbow, bubble and flicker etc. It can use the displaying tips to do the comprehensive
program operation; the character, symbol and mark of description function are neat.
6.1.3 There shall be no cracks, deformation, muddiness and glitch etc.; the surface
coating shall be uniform, without corrosion, rust, detachment and abrasion. Product
assembly shall be firm; and the components shall not be loose. The control of button,
switch and lock etc. shall be flexible and reliable.
6.2 Performance requirements
6.2.1 Sampling/metering unit
6.2.1.1 It shall be made of anti-corrosive material so that the determination result will
not be impacted because of the corrosion of reagents or actual waste water.
6.2.1.2 The measuring parts shall guarantee the accuracy of reagents and actual
waste water sampling; the operating instructions shall clarify the maximum particle
size of suspension that can go through the instrument internal pipeline.
6.2.1.3 It shall have internal pipeline self-cleaning function which can prevent from
cross contamination between different samples.
6.2.2 Analytical unit
6.2.2.1 It shall be made of anti-corrosive material of which the structure shall be easy
to be cleaned.
6.2.2.2 The output signal of determination value shall be stable. Within the
determination measuring-range specified in this Standard, performance index shall
comply with the requirements of Table 1.
6.2.2.3 It shall have the automatic zero calibration and measuring-range calibration
function that can set up automatic calibration cycle to guarantee the accuracy of
measured values.
6.2.3 Controlling unit
6.2.3.1 It shall have thee feedback function of failure information (over-range alarm,
reagent absent alarm, metering component failure alarm).
6.2.3.2 It shall have analog and digital output interfaces. Through digital interface,
remote control instructions can be received.
6.2.3.3 Data processing system shall store at least 12 months’ raw data. It can set up
condition inquiry and display historical data.
6.3 Safety requirements
6.3.1 Insulation resistance between power lead-wire and enclosure shall not be less
than 20 MΩ.
6.3.2 It shall set up leakage protection device to avoid personal electric shock; It shall
also set up overload protection device to prevent the instrument from accidental
burning.
7 Operating instructions
Operating instructions of water quality automatic on-line monitor of chromium (VI)
shall at least include the following contents. on-site installation conditions and
methods, operating methods of automatic on-line monitor, usage of reagents,
common failures handling, and waste-liquid handling.
......
|