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GB 23200.8-2016: Food safety national standard -- Determination of 500 pesticides and related chemical residues in fruits and vegetables -- Gas chromatography-mass spectrometry
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Food safety national standard -- Determination of 500 pesticides and related chemical residues in fruits and vegetables -- Gas chromatography-mass spectrometry
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GB 23200.8-2016
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Basic data | Standard ID | GB 23200.8-2016 (GB23200.8-2016) | | Description (Translated English) | Food safety national standard -- Determination of 500 pesticides and related chemical residues in fruits and vegetables -- Gas chromatography-mass spectrometry | | Sector / Industry | National Standard | | Classification of Chinese Standard | G25 | | Word Count Estimation | 62,683 | | Date of Issue | 2016-12-18 | | Date of Implementation | 2017-06-18 | | Older Standard (superseded by this standard) | GB/T 19648-2006 | | Regulation (derived from) | State Health Commission, Ministry of Agriculture, Food and Drug Administration Notice No. 16 of 2016 | | Issuing agency(ies) | National Health and Family Planning Commission of the People's Republic of China, State Food and Drug Administration | GB 23200.8-2016: Food safety national standard -- Determination of 500 pesticides and related chemical residues in fruits and vegetables -- Gas chromatography-mass spectrometry
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Food safety national standard - Determination of 500 pesticides and related chemical residues in fruits and vegetables - Gas chromatography-mass spectrometry
ICS
National Standards of People's Republic of China
Replace GB/T 19648-2006
National standards for food safety
500 kinds of pesticides and related chemicals in fruits and vegetables
Determination of residual amount
Gas chromatography - mass spectrometry
National food safety standards-
Determination of 500 pesticides and related items residues in fruits and
Vegetables
Gas chromatography-mass spectrometry
2016-12-18 Release.2017-06-18 Implementation
Directory
Preface II
1 Scope 1
2 normative reference document 1
Principle 1
4 reagents and materials 1
5 instruments and equipment 2
6 Preparation of sample 2
7 Analysis Step 2
Calculation and presentation of results 3
9 precision 4
10% limit and recovery rate 4
Appendix A (informative) 500 kinds of pesticides and related chemicals, English name, method of quantitative limit, grouping, solvent selection
And mixed standard solution concentrations
Appendix B (informative) Retention time for 500 pesticides and related chemicals and internal standard compounds, quantitative ions,
The ratio of qualitative and quantitative ions to qualitative ions
Appendix C (Informative Appendix) Group A, B, C, D and E Group 5 Selective Ion Monitoring Group for Pesticides and Related Chemicals Table 31
Appendix D (informative) Reference substance Select ion monitoring GC-MS in apple matrix Figure 35
Appendix E (informative) Relative standard deviation in laboratory
Appendix F (informative) Relative standard deviation between laboratories 41
Appendix G (informative) Sample added recovery rate Experimental data 42
Foreword
This standard replaces GB/T 19648-2006 "Determination of 500 pesticides and related chemical residues in fruits and vegetables. Gas Chromatography-Mass Spectrometry
law".
This standard compared with GB/T 19648-2006, the main changes are as follows.
- Standard text format is modified to national standard text format for food safety;
- Add the "other vegetables and fruits to the reference" in the standard range.
This standard replaced the previous version of the standard release.
-GB/T 19648-2006.
National standards for food safety
Determination of 500 pesticides and related chemical residues in fruits and vegetables
Gas chromatography - mass spectrometry
1 Scope
This standard specifies 500 pesticides and related chemicals in apples, citrus, grapes, cabbage, celery and tomatoes (see Appendix A)
Determination of Residue by Gas Chromatography - Mass Spectrometry.
This standard applies to the determination of 500 pesticides and related chemicals residues in apples, citrus, grapes, cabbage, celery and tomatoes,
Other vegetables and fruits can refer to the implementation.
2 normative reference documents
The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article
Pieces. For undated references, the latest edition (including all modifications) applies to this document.
GB 2763 National Standard for Food Safety - Maximum Residue Limit of Pesticides in Foodstuffs
GB/T 6682 Analytical laboratory water specifications and test methods
3 principle
The samples were extracted with acetonitrile and homogenized. After centrifugation, the supernatant was purified and purified by solid phase extraction column. The samples were washed with acetonitrile-toluene solution (3 1)
De-pesticide and related chemicals, solvent exchange and gas chromatography-mass spectrometry.
4 reagents and materials
4.1 Reagents
4.1.1 Acetonitrile (CH3CN, 75-05-8). Chromatographic Purification.
4.1.2 sodium chloride (NaCl, 7647-14-5). excellent grade pure.
4.1.3 anhydrous sodium sulfate (Na2SO4,7757-82-6). analytical grade. Before burning at 650 ℃ for 4h, stored in a dryer, cooling and standby.
4.1.4 Toluene (C7H8, 108-88-3). excellent grade pure.
4.1.5 Acetone (CH3COCH3,67-64-1). Analytical pure, re-distilled.
4.1.6 dichloromethane (CH2Cl2, 75-09-2). chromatographic purity.
4.1.7 n-hexane (C6H14,110-54-3). analytical grade, heavy distillation.
4.2 standards
Pesticide and Related Chemical Reference Material. Purity ≥95%, see Appendix A.
4.3 standard solution preparation
4.3.1 Standard stock solution
Respectively, to take appropriate (accurate to 0.1mg) a variety of pesticides and related chemical standards were 10mL volumetric flask, according to the standard
Of the dissolved toluene, toluene acetone mixture, dichloromethane and other solvents dissolved and constant volume to the scale (solvent options see Appendix A), the standard
The solution is stored at 4 ° C for 4 years.
4.3.2 Mixing standard solutions (mixed standard solutions A, B, C, D and E)
According to the nature and retention time of pesticides and related chemicals, 500 kinds of pesticides and related chemicals will be divided into A, B, C, D, E five
And the concentration of each pesticide and associated chemical in the instrument to determine the concentration in the mixed standard solution. This is the standard
The grouping of 500 pesticides and related chemicals and their mixed standard solution concentrations are given in Appendix A.
Depending on the group number of each pesticide and associated chemical, the concentration of the standard solution and the concentration of the standard stock solution,
Pesticide and related chemicals standard stock solution in a 100mL volumetric flask, with toluene volume to the scale. Mix the standard solution in the dark at 4 ℃
Save, save for a month.
4.3.3 internal standard solution
Accurately weighed 3.5mg epoxy heptachlor in 100mL volumetric flask, with toluene volume to the scale.
4.3.4 matrix mixed standard working solution
A, B, C, D, E group of pesticide and related chemical matrix mixed standard working solution is 40μL standard solution (4.3.3) and 50
ΜL mixed standard solution (4.3.2) were added to 1.0 mL of the sample blank matrix extract, mixed, dubbed the matrix mixed standard
Solution A, B, C, D and E. Matrix mixed standard working solution should be used with the current distribution.
4.4 Materials
4.4.1 Envi-18 column 1). 12 mL, 2.0 g or equivalent.
4.4.2Envi -Carb1
) Activated carbon column. 6 mL, 0.5 g or equivalent.
4.4.3Sep-Pak2
NH2 solid phase extraction column. 3 mL, 0.5 g or equivalent.
5 instruments and equipment
5.1 Gas Chromatography-Mass Spectrometer. Equipped with an electron impact source (EI).
5.2 Analysis of balance. 0.01 g and 0.0001 g.
5.3 Homogenizer. speed not less than.20000 r/min.
5.4 chicken heart bottle..200 mL.
5.5 Pipettes. 1 mL.
5.6 nitrogen dryers.
6 sample preparation
Fruit, vegetable sample sampling site according to GB 2763 Appendix A, the sample chopped and homogenized homogenized homogenized, prepared samples
Are divided into two, into a clean sample container, sealed and marked. The samples were cryopreserved at -18 ° C.
7 Analysis steps
7.1 Extraction
Weigh 20 g of sample (accurate to 0.01 g) in a 80 mL centrifuge tube, add 40 mL of acetonitrile, homogenize at 15000 r/min homogenate
Extract 1min, add 5g sodium chloride, and then homogenate extraction 1min, the centrifuge tube into the centrifuge, centrifugation at 3000 r/min 5min, take
Clear liquid 20mL (equivalent to 10g sample volume), to be purified.
7.2 Purification
7.2.1 Envi -18 column into the fixed frame, before adding the first 10mL acetonitrile pre-wash column, then the next heart of the bottle, into the 20mL extraction
And the column was washed with 15 mL of acetonitrile and the collected extract and washings were spin concentrated to about 1 mL in a water bath at 40 ° C for use.
7.2.2 To the Envi -Carb column, add about 2 cm of anhydrous sodium sulfate, connect the column to the top of the Sep-Pak ammonia column,
Then put the bottle on the fixed frame. The column was pre-washed with 4 mL of acetonitrile-toluene solution (3 1) before loading, and when the liquid level reached the top of the sodium sulfate,
The sample concentrate (7.2.1) was quickly transferred to a purification column and the vial was washed three times with 2 mL of acetonitrile-toluene solution (3 1)
And the washing liquid was transferred to the column. A 50 mL reservoir was added to the tandem column and the tandem was washed with 25 mL of acetonitrile-toluene solution (3 1)
All effluent was placed in a chicken heart and concentrated in a 40 ° C water bath to about 0.5 mL. Each time 5 mL of n-hexane was added in a 40 ° C water bath
Rotary evaporation, solvent exchange twice, and finally the sample volume is about 1mL, add 40μL internal standard solution, mix, for gas chromatography
- Mass spectrometry.
The Envi-18 column and the Envi -Carb column are the trade names of SUPELCO's products. This information is intended for the convenience of users of this standard and does not imply endorsement of the product.
If other equivalent products have the same effect, you can use these equivalent products.
The Sep-Pak NH2 column is the product name of Waters' products, and this information is intended for the convenience of this standard and is not intended to be a recognition of the product. If other equivalent production
Products have the same effect, you can use these equivalent products.
7.3 Determination
7.3.1 Gas Chromatography - Mass Spectrometry Reference Conditions
A) Column. DB-1701 (30m × 0.25mm × 0.25μm) quartz capillary column or equivalent;
B) Column temperature program. 40 ℃ for 1 min, then 30 ℃/min program temperature to 130 ℃, then 5 ℃/min temperature to 250 ℃,
And then to 10 ℃/min temperature to 300 ℃, keep 5 min;
C) Carrier gas. helium, purity ≥99.999%, flow rate. 1.2mL/min;
D) Inlet temperature. 290 ° C;
E) Injection volume. 1 ° C;
F) Injection method. no split injection, 1.5 min after the opening of the diversion valve and septum purge valve;
G) electron bombardment source. 70 eV;
H) ion source temperature. 230 ° C;
I) GC-MS interface temperature. 280 degrees;
J) Select ion monitoring. Each compound selected a quantitative ion, 2 to 3 qualitative ions. Each group needs to be tested for all ions
According to the peak sequence, respectively, time detection. The retention time of each compound, the quantitative ion, the qualitative ion and the quantitative ion and the qualitative ion
Abundance ratio, see Appendix B. Refer to Appendix C for the start time and dwell time of each group to detect ions.
7.3.2 Qualitative determination
When the sample is measured, if the retention time of the detected peaks is consistent with the standard sample, and after the background mass
In the figure, the selected ions are present, and the selected ion abundance ratio is consistent with the ion abundance ratio of the standard sample (relative abundance > 50%
Allow ± 10% deviation; relative abundance > 20% to 50% allow ± 15% deviation; relative abundance > 10% to 20% allow ± 20% deviation; phase
The abundance ≤ 10%, allowing ± 50% deviation), you can determine the existence of such pesticides or related chemicals in the sample. If it can not be confirmed, should be repeated
Injection, in scanning mode (with sufficient sensitivity) or by adding other confirmed ions or with other higher sensitivity analytical instruments
Confirmation.
7.3.3 Quantitative determination
This method uses the internal standard method to determine the single ion quantification. The internal standard is epoxy heptachlor. To reduce the impact of the matrix, the amount of standard solution should be used
Work with a matrix mixed standard solution. The concentration of the standard solution should be close to the concentration of the compound to be tested. The method of A, B, C, D, E five
Group Reference Material Selects Ion Monitoring GC-MS in Apple Substrate See Appendix D.
7.4 parallel test
According to the above steps to the same sample parallel determination.
7.5 blank test
Unless the sample is not weighed, according to the above steps.
8 results are calculated and expressed
The result of gas chromatography-mass spectrometry can be calculated automatically by computer according to internal standard method, and can be calculated according to formula (1)
X = Cs ×
Ci
Asi
(1) As Csi Ai m 1000
Where.
Residue of the test substance in milligrams per kilogram (mg/kg);
Cs
The concentration of the test substance in the standard working solution, in micrograms per milliliter (μg/mL);
The chromatographic peak area of the analyte in the sample solution;
As
Matrix chromatographic peak area of the test solution in the standard working solution;
Ci
The concentration of the internal standard in the sample solution, in micrograms per milliliter (μg/mL);
Csi
The concentration of the internal standard in the standard working solution of the matrix, in micrograms per milliliter (μg/mL);
Asi
Matrix chromatographic peak area of standard working solution;
Ai
The chromatographic peak area of the internal standard in the sample solution;
The final volume of the sample solution in milliliters (mL);
The mass of the sample represented by the sample solution, in grams (g).
The result of the calculation should be deducted from the blank value. The result of the measurement is expressed by the arithmetic mean of the parallel measurement, and the two valid digits are retained.
9 precision
9.1 The ratio (percentage) of the absolute difference between the two independent determinations obtained under reproducibility and its arithmetic mean shall be in accordance with the Appendix
E requirements.
9.2 The ratio of the absolute difference between the two independent determinations obtained under reproducibility and its arithmetic mean (percentage) shall be in accordance with the
Record F requirements.
10% limit and recovery rate
10.1 Quantitation limits
The quantitative limits of this method are given in Appendix A.
10.2 Recovery rate
When adding levels of LOQ, 2 × LOQ, 10 × LOQ, add the recovery rate see Appendix G.
Appendix A
(Informative)
500 pesticides and related chemicals Method Quantification limits, grouping, solvent selection and mixing Standard solution concentration
A.1 500 kinds of pesticides and related chemicals, English name, method of quantitative limit, grouping, solvent selection and mixed standard solution concentration table
See Table A.1.
Table A.1
Chinese name English name
The limit of quantitation
(Mg/kg)
Solvent
Mixed standard dissolved
Concentration (mg/L)
Epichlorohydrin Heptachlor-epoxide
Group A
1 diacrylamide Allidochlor 0.0250 Toluene 5
2 allyl herbicides Dichlormid 0.0250 toluene 5
3 soil fungus Etridiazol 0.0376 Toluene 7.5
4 Chloromethylthiophosphate Chlormephos 0.0250 Toluene 5
5 Aniline Ling Propham 0.0126 Toluene 2.5
6 ring grass enemy Cycloate 0.0126 toluene 2.5
7 biphenyl diamine Diphenylamine 0.0126 Toluene 2.5
8 chlordimeform 0.0126 n-hexane 2.5
Ethanolluralin 0.0500 Toluene 10
10 Phorate Phorate 0.0126 Toluene 2.5
11 Methylphenanthroline Thiometon 0.0126 Toluene 2.5
12 Pentachlorobenzene Quintozene 0.0250 Toluene 5
13 deacetylated atrazine-desethyl 0.0126 toluene acetone (8 2) 2.5
14 Clamazone 0.0126 Toluene 2.5
15 Diazinon 0.0126 Toluene 2.5
16 Pesticide Fonofos 0.0126 Toluene 2.5
17 spiramide Etrimfos 0.0126 Toluene 2.5
18 Simaxin Simazine 0.0126 Methanol 2.5
19 Amphetamine Propetamphos 0.0126 Toluene 2.5
20 sec-butyl pass Secbumeton 0.0126 Toluene 2.5
21 Diplox Dichlofenthion 0.0126 Toluene 2.5
22 Acetyl Acetate Pronamide 0.0126 Toluene Acetone (9 1) 2.5
23 Zeke Mexacarbate 0.0376 Toluene 7.5
24 Aldrin Aldrin 0.0250 Toluene 5
25 Amificin Dinitramine 0.0500 Toluene 10
26 Flies Phosphorus Ronnel 0.0250 Toluene 5
Preserved 2.0
28 Cycloprozine Cyprazine 0.0126 Toluene Acetone (9 1) 2.5
29 Vinylloxacin Vinclozolin 0.0126 Toluene 2.5
30 beta-666 Beta-HCH 0.0126 Toluene 2.5
31 metalaxyl metalaxyl 0.0376 toluene 7.5
32 Chlorpyrifos Chlorochrifos (-ethyl) 0.0126 Toluene 2.5
33 methyl parathion Methyl-Parathion 0.0500 Toluene 10
Table A.1
Chinese name English name
The limit of quantitation
(Mg/kg)
Solvent
Mixed standard dissolved
Concentration (mg/L)
34 anthraquinone Anthraquinone 0.0126 dichloromethane 2.5
35 δ-666 Delta-HCH 0.0250 Toluene 5
36 times thiophosphate Fenthion 0.0126 Toluene 2.5
37 malathion 0.0500 Toluene 10
38 Fenitrothion 0.0250 Toluene 5
39 Paraoxon-ethyl 0.4000 Toluene 80
40 Triazolone Triadimefon 0.0250 Toluene 5
Parathion 0.0500 Toluene 10
42 Pendimethalin 0.0500 Toluene 10
Table A.1 (continued)
Chinese name English name
The limit of quantitation
(Mg/kg)
Solvent
Mixed standard dissolved
Concentration (mg/L)
Potentonolone (9 1) 10
44 Acetone
45 Ethyl bromothiophosphate Bromophos-ethyl 0.0126 Toluene 2.5
46 Quetiapine Quinalphos 0.0126 Toluene 2.5
47 trans-Chlordane 0.0126 Toluene 2.5
48 Puffing powder
49 Pyrazolamine Metazachlor 0.0376 Toluene 7.5
50 benzenithium fenothiocarb 0.0250 acetone 5
51 Phoxim Prothiophos 0.0126 Toluene 2.5
52 Formulated Alcohol Chlorfurenol 0.0376 Toluene Acetone (9 1) 7.5
53 Dieldrin Dieldrin 0.0250 Toluene 5
54 Pythiumate Procymidone 0.0126 Toluene 2.5
55 Methidathion 0.0250 Toluene 5
56 Cyanazine Cyanazine 0.0376 Toluene Acetone (8 2) 7.5
57 Diclofenac Napropamide 0.0376 Toluene 7.5
58 Oxadenazole Oxidiazone 0.0126 Toluene 2.5
59 Benzene Phosphorus Fenamiphos 0.0376 Toluene 7.5
60 acaricides chlorothiazide Tetrasul 0.0126 toluene 2.5
61 mite special Aramite 0.0126 dichloromethane 2.5
62 Ethyl pyrimethanone Bupirimate 0.0126 Toluene 2.5
63 Moisturizer Carboxin 0.3000 Toluene 60
64 fluoroamide Flutolanil 0.0126 Toluene 2.5
65 p, p'-drop 4,4'-DDD 0.0126 Toluene 2.5
Ethoxine 0.0250 Toluene 5
67 thiophanate Sulprofos 0.0250 toluene 5
68 Ethylenediazol-1 Etaconazole-1 0.0376 Toluene 7.5
69 Ethylenediocarbazole-2 Etaconazole-2 0.0376 Toluene 7.5
70 Myclobutanil 0.0126 Toluene 2.5
Table A.1
Chinese name English name
The limit of quantitation
(Mg/kg)
Solvent
Mixed standard dissolved
Concentration (mg/L)
71 Grassesum Diclofop-methyl 0.0126 Toluene 2.5
72 Propionazole Propoxazole 0.0376 Toluene 7.5
73 Forskophane Fensulfothion 0.0250 Toluene 5
74 Bifenthrin Bifenthrin 0.0126 n-hexane 2.5
75 Mirex 0.0126 Toluene 2.5
76 wheat rust Ling Benodanil 0.0376 Toluene 7.5
77 Fluorophenylpyrone Nuarimol 0.0250 Toluene Acetone (9 1) 5
78 Methoxy Dioxide Methoxychlor 0.1000 Toluene 20
79 Oxalic acid Oxadixyl 0.0126 Toluene 2.5
80 Tetramethrin 9550 Toluene 5
81 tebuconazole 0.076 toluene 7.5
82 Fluorouracil Norflurazon 0.0126 Toluene Acetone (9 1) 2.5
83 pyridazine phosphoric acid Pyridaphenthion 0.0126 Toluene 2.5
84 Amimidophos Phosmet 0.0250 Toluene 5
85 Dicofolone Tetradifon 0.0126 Toluene 2.5
86 Oxidic acid Oxycarboxin 0.0750 Toluene Acetone (9 1) 15
87 cis-permethrin cis-Permethrin 0.0126 toluene 2.5
88 trans-permethrin trans-Permethrin 0.0126 toluene 2.5
89 Pythium Phosphor Pyrazophos 0.0250 Toluene 5
90 cypermethrin Cypermethrin 0.0376 Toluene 7.5
Potassium fenvalerate
Deltamethrin 0.0750 Toluene 15
Group B
93 Green grass enemy EPTC 0.0376 Toluene 7.5
94 Butylate 0.0376 Toluene 7.5
Sodium Diclobenil 0.0026 Toluene 0.5
96 grams of grass enemy Pebulate 0.0376 toluene 7.5
97 Trichloromethylpyridine Nitrapyrin 0.0376 Toluene 7.5
98 Meansphos 0.0250 Toluene 5
99 Chloroanisole Chloroneb 0.0126 Toluene 2.5
100 Tetrachloronitrobenzene Tecnazene 0.0250 Toluene 5
101 heptenol phosphate Heptanophos 0.0376 Toluene 7.5
102 Hexachlorobenzene 0.0126 Toluene 2.5
103 off line phosphorus Ethoprophos 0.0376 Toluene 7.5
104 cis - oat enemy cis-diallate 0.0250 toluene 5
Chlorperoxylamine Propachlor 0.0376 Toluene 7.5
106 trans-oat enemy trans-diallate 0.0250 toluene 5
107 Trifluralin 0.0250 Toluene 5
108 Chlorohydrin Ling Chlorpropham 0.0250 Toluene 5
109 Chopsticks Sulfotep 0.0126 Toluene 2.5
Sugar Cream Sulfallate 0.0250 Toluene 5
Table A.1
Chinese name English name
The limit of quantitation
(Mg/kg)
Solvent
Mixed standard dissolved
Concentration (mg/L)
111 α-hexahydra Alpha-HCH 0.0126 Toluene 2.5
112 Tertin Sulfur Terbufos 0.0250 Toluene 5
113 Tinting Terriereton 0.0376 Toluene 7.5
114 Ciprofloxacin Profluralin 0.0500 Toluene 10
Rhodophyll Dioxathion 0.0500 Toluene 10
Paste Fujin Propazine 0.0126 Toluene 2.5
117 Chloroacetyl Chlorbufam 0.0250 Toluene 5
118 Chlorosamidamine Dicloran 0.0250 Toluene Acetone (9 1) 5
119 Terbuthylazine 0.0126 Toluene 2.5
120 Green Valley Long Monolinuron 0.0500 Toluene 10
121 Fipronil Fluffenoxuron 0.0376 Toluene Acetone (8 2) 7.5
122 Crack nitrile Cyanophos 0.0250 Toluene 5
123 Chlorpyrifos-methyl 0.0126 Toluene 2.5
Toledo Desmetryn 0.0126 Toluene 2.5
125 Dimethachlor 0.0376 Toluene 7.5
126 alachlor Alachlor 0.0376 Toluene 7.5
127 Methylpyrimidine Pirimiphos-methyl 0.0126 Toluene 2.5
128 Tertin Pure Terbutryn 0.0250 Toluene 5
129 Shabu Dan Thiobencarb 0.0250 Toluene 5
130 Propionate Aspon 0.0250 Toluene 5
Dicofol 0.0250 Toluene 5
132 Metolachlor 0.0126 Toluene 2.5
Alkyl Chloride Oxy-chlordane 0.0126 Toluene 2.5
Potassium pyrimidine Pirimiphos-ethyl 0.0250 Toluene 5
Tolerolone Methoprene 0.0500 Toluene 10
136 bromothiophosphate Bromofos 0.0250 Toluene 5
Benzene sulfonamide Dichlofluanid 0.6000 Toluene 120
138 Ethoxy Diclofen Ethofumesate 0.0250 Toluene 5
139 Isopropalin 0.0250 Toluene 5
140 Endosulfan -1 Endosulfan -1 0.0750 Toluene 15
Propanil 0.0250 Toluene Acetone (9 1) 5
Isofenphos 0.0250 Toluene 5
Nutritional Cruge of Toluene
Soluble insects Chlorfenvinphos 0.0376 Toluene 7.5
145 cis-chlordane cis-Chlordane 0.0250 toluene 5
146 Toluene Fluorosulfonamide Tolylfluanide 0.3000 Toluene 60
147 p, p'-drop i 4,4'-DDE 0.0126 Toluene 2.5
Butachlor 0.0250 Toluene 5
149 Bacillus fungus Chlozolinate 0.0250 Toluene 5
150 Copoloxyphos 0.0750 Toluene 15
151 Iodophanate Iodofenpho...
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