Heavy metals

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PURPOSE

To provide a comprehensive report detailing the relationship between Rx Green Technologies’ nutrient program and heavy metals levels in cannabis.

SUMMARY

Because Rx Green Technologies’ plant nutrients are formulated using ultra-refined, pharmaceutical grade ingredients, heavy metals in these products are essentially non-existent. Therefore, when using Rx Green Technologies’ nutrients in an inert growing media, growers can expect their plants to absorb extremely small amounts of heavy metals, resulting in final product that will pass the most stringent state regulations.

HEAVY METALS IN RX GREEN TECHNOLOGIES’ NUTRIENT PROGRAM

The following chart details the results of heavy metals tests on samples of Rx Green Technologies’ base nutrients and additives, ENERGY and BULK. The samples are representative of how the nutrients would be prepared for feeding to plants, mixed with water at a rate of 25ml/gal (base nutrients) and 10ml/gal (additives). Tests were conducted at New England Testing Laboratory (NETLabs), located in West Warwick, RI. The reports below are dated April 22, 2016 and May 16, 2016.

Additional Notes:

  • “ND” or “Non Detected” indicates the result is lower than the detection limit.
  • Results are recorded in mg/l or ppm

 

RESULTS
GROW A GROW B BLOOM A BLOOM B ENERGY BULK Detection Limit (mg/l) Acceptable Limit (mg/l)*
Analyte ND ND ND ND ND ND 0.01 10
Cadmium ND ND ND ND ND ND 0.005 5
Lead ND ND ND ND 0.02 0.03 0.01 15
Mercury ND ND ND ND ND ND 0.0002 2

*acceptable limits are based on the Massachusetts DPH water limit for medical marijuana growth

CANNABIS GROWN WITH RX GREEN TECHNOLOGIES’ NUTRIENT PROGRAM

The following charts detail the results of heavy metals tests on samples of cannabis grown with Rx Green Technologies’ full nutrient program in an inert growing media. Tests were conducted at Massachusetts Cannabis Research Labs (MCR Labs), located in Framingham, MA. The reports below are dated November 3, 2016. The limits in the “limits ppb” column are the revised heavy metals limits implemented by the Massachusetts Department of Public Health. Refer to the appendix for a copy of the report issued on 11/3/16.

Heavy Metals Screen [MCR-TM-0008]  Analyst:DO  Test Date: 3 Nov 16

The sample was analyzed via Inductively Coupled Plasma Mass Spectrometry. The collected data was compared to data collected from certified analytical reference standards at know concentrations.

Test Analysis Result, ppb LOD ppb LOQ ppb Limits ppb Disposition
Arsenic 20.6 36.3 110.1 200 Pass
Cadmium 77.4 31.6 95.7 200 Pass
Mercury 43.2 24.2 73.3 100 Pass
Lead 36.5 26.6 80.6 500 Pass

Note: ND= Not detected; LOD= Limit of Detection; LOQ= Limit of Quantitation; ppb= part per billion. Testing limits established by the Massachusetts Department of Public Health, Protocol for Sampling and Analysis of Finished Medical Marijuana Products and Marijuana-Infused Products for Massachusetts Registered Medical Marijuana Dispensaries, Exhibit 4.

CONCLUSION

Heavy metals occur in the environment both naturally and from pollution. These substances include the elements arsenic, cadmium, mercury and lead, all of which are known to be highly toxic, even at very low levels.

During the growing process, heavy metals can often be found in the soil, water and nutrients used. The higher the heavy metal levels in these inputs, the higher the heavy metal levels in the outputs (cannabis flower). This is especially important to understand when growing cannabis as the cannabis plant is a “bioaccumulator”, meaning it hyperaccumulates metals from the soil and makes heavy metals toxicity to the end user high.

Rx Green Technologies’ nutrients are naturally based and purposefully formulated to grow plants for safe human consumption. We use pure raw ingredients (or “pharmaceutical grade”) meaning that the inputs are 99% pure and ultra-refined to be stripped of heavy metals. This helps to explain why heavy metal levels in cannabis grown with Rx Green Technologies’ nutrient program are essentially non-existent.

SOURCES

http://www.grozine.com/2014/06/20/understanding-hydroponics-fertilizer-materials/


Due to the variability associated with growing inputs (soil, water, additives, etc), testing labs, and testing methodologies, individual results may vary.

APPENDIX

Heavy Metals in Rx Green Technologies’ base nutrients:

 

SAMPLES SUBMITTED and REQUEST FOR ANALYSIS:

The samples listed in Table I were submitted to New England Testing Laboratory on April 15, 2016. The group of samples appearing in this report was assigned an internal identification number (case number) for laboratory information management purposes. The client’s designations for the individual samples, along with our case number, are used to identify the samples in this report. This report of analytical results pertains only to the sample(s) provided to us by the client which are indicated on the custody record. The case number for this sample submission is C0415-03.

Custody records are included in this report.

TABLE I, Samples Submitted

Sample ID Date Sampled Matrix Analysis Requested
Bloom Part A 4/8/2016 Water Table II
Bloom Part B 4/8/2016 Water Table II
Grow Part A 4/8/2016 Water Table II
Grow Part B 4/8/2016 Water Table II

The samples “Bloom Part A” “Bloom Part B” “Grow Part A”, and “Grow Part B” were analyzed for the compounds listed in the following tables. Those compounds exceeding the Acceptable Limits for Massachusetts Medical Use of Marijuana Growing Media guidelines are flagged with an *.

TABLE II, Analysis and Methods

ANALYSIS PREPARATION METHOD DETERMINATIVE METHOD
Hexavalent Chromium NA Sm 3500Cr-B
Total Metals
Antimony 3010A 6010C
Arsenic 3010A 6010C
Cadmium 3010A 6010C
Copper 3010A 6010C
Lead 3010A 6010C
Mercury NA 7470A
Nickel 3010A 6010C

These methods are documented in: Test Methods for Evaluating Solid Waste, Physical/Chemical Methods, SW-846, USEPA/OSW.

CASE NARRATIVE

The sample was received at 10°C. All analyses were performed within EPA designated holding-times.

Sample ID: Bloom Part A     Case No.: C0415-03

Metals

Analyte CAS Results (mg/l) Detection Limit (mg/l) Acceptable Limit (mg/l) Date Analyzed
Antimony 7440-36-0 ND 0.0600 6 4/20/2016
Arsenic 7440-38-2 ND 0.0100 10 4/20/2016
Cadmium 7440-43-9 ND 0.0050 5 4/20/2016
Copper 7440-50-8 0.0300 0.0250 100 4/21/2016
Lead 7439-92-1 ND 0.0100 1300 4/21/2016
Nickel 7440-02-0 ND 0.0400 15 4/20/2016
Mercury (CVAA) 7439-97-6 ND 0.0002 100 4/19/2016
Hexavalent Chromium 18540-29-9 ND 0.01 2 4/20/2016

ND Indicates Non Detected * Indicates Result is above Acceptable Limits

Sample ID: Bloom Part B    Case No.: C0415-03

Metals

Analyte CAS Results (mg/l) Detection Limit (mg/l) Acceptable Limit (mg/l) Date Analyzed
Antimony 7440-36-0 ND 0.0600 6 4/20/2016
Arsenic 7440-38-2 ND 0.0100 10 4/20/2016
Cadmium 7440-43-9 ND 0.0050 5 4/20/2016
Copper 7440-50-8 ND 0.0250 100 4/21/2016
Lead 7439-92-1 ND 0.0100 1300 4/21/2016
Nickel 7440-02-0 ND 0.0400 15 4/20/2016
Mercury (CVAA) 7439-97-6 ND 0.0002 100 4/19/2016
Hexavalent Chromium 18540-29-9 ND 0.01 2 4/20/2016

ND Indicates Non Detected * Indicates Result is above Acceptable Limits

Sample ID: Grow Part A Case No.: C0415-03

Metals

Analyte CAS Results (mg/l) Detection Limit (mg/l) Acceptable Limit (mg/l) Date Analyzed
Antimony 7440-36-0 ND 0.0600 6 4/20/2016
Arsenic 7440-38-2 ND 0.0100 10 4/20/2016
Cadmium 7440-43-9 ND 0.0050 5 4/20/2016
Copper 7440-50-8 0.0300 0.0250 100 4/21/2016
Lead 7439-92-1 ND 0.0100 1300 4/21/2016
Nickel 7440-02-0 ND 0.0400 15 4/20/2016
Mercury (CVAA) 7439-97-6 ND 0.0002 100 4/19/2016
Hexavalent Chromium 18540-29-9 ND 0.01 2 4/20/2016

 

ND Indicates Non Detected * Indicates Result is above Acceptable Limits

Sample ID: Grow Part B Case No.: C0415-03

Metals

Analyte CAS Results (mg/l) Detection Limit (mg/l) Acceptable Limit (mg/l) Date Analyzed
Antimony 7440-36-0 ND 0.0600 6 4/20/2016
Arsenic 7440-38-2 ND 0.0100 10 4/20/2016
Cadmium 7440-43-9 ND 0.0050 5 4/20/2016
Copper 7440-50-8 0.0400 0.0250 100 4/21/2016
Lead 7439-92-1 ND 0.0100 1300 4/21/2016
Nickel 7440-02-0 ND 0.0400 15 4/20/2016
Mercury (CVAA) 7439-97-6 ND 0.0002 100 4/19/2016
Hexavalent Chromium 18540-29-9 ND 0.01 2 4/20/2016

 

ND Indicates Non Detected * Indicates Result is above Acceptable Limits

SAMPLES SUBMITTED and REQUEST FOR ANALYSIS:

The samples listed in Table I were submitted to New England Testing Laboratory on May 12, 2016. The group of samples appearing in this report was assigned an internal identification number (case number) for laboratory information management purposes. The client’s designations for the individual samples, along with our case number, are used to identify the samples in this report. This report of analytical results pertains only to the sample(s) provided to us by the client which are indicated on the custody record. The case number for this sample submission is C0512-04.

Custody records are included in this report.

TABLE I, Samples Submitted

 

Sample ID Date Sampled Matrix Analysis Requested
Energy 5/11/2016 Water Table II
Bulk 5/11/2016 Water Table II

The samples “Bloom Part A” “Bloom Part B” “Grow Part A”, and “Grow Part B” were analyzed for the compounds listed in the following tables. Those compounds exceeding the Acceptable Limits for Massachusetts Medical Use of Marijuana Growing Media guidelines are flagged with an *.

TABLE II, Analysis and Methods

ANALYSIS PREPARATION METHOD DETERMINATIVE METHOD
Hexavalent Chromium NA Sm 3500Cr-B
Total Metals
Antimony 3010A 6010C
Arsenic 3010A 6010C
Cadmium 3010A 6010C
Copper 3010A 6010C
Lead 3010A 6010C
Mercury NA 7470A
Nickel 3010A 6010C
Zinc 3010A 6010C

These methods are documented in:

Test Methods for Evaluating Solid Waste, Physical/Chemical Methods, SW-846, USEPA/OSW.

CASE NARRATIVE

The sample was received at 10°C. All analyses were performed within EPA designated holding-times.

Sample ID: Energy Case No.: C0512-04

Metals

Analyte CAS Results (mg/l) Detection Limit (mg/l) Acceptable Limit (mg/l) Date Analyzed
Antimony 7440-36-0 ND 0.0600 6 5/16/2016
Arsenic 7440-38-2 ND 0.0100 10 5/16/2016
Cadmium 7440-43-9 ND 0.0050 5 5/16/2016
Copper 7440-50-8 ND 0.0250 1300 5/16/2016
Lead 7439-92-1 0.0200 0.0100 15 5/16/2016
Nickel 7440-02-0 ND 0.0400 15 5/16/2016
Mercury (CVAA) 7439-97-6 ND 0.0002 100 5/18/2016
Zinc 7440-66-6 ND 0.0200 NA 5/16/2016
Hexavalent Chromium 18540-29-9 ND 0.01 2 5/17/2016

ND Indicates Non Detected * Indicates Result is above Acceptable Limits

 

Sample ID: Bulk Case No.: C0512-04
Metals

Analyte CAS Results (mg/l) Detection Limit (mg/l) Acceptable Limit (mg/l) Date Analyzed
Antimony 7440-36-0 ND 0.0600 6 5/16/2016
Arsenic 7440-38-2 ND 0.0100 10 5/16/2016
Cadmium 7440-43-9 ND 0.0050 5 5/16/2016
Copper 7440-50-8 ND 0.0250 1300 5/16/2016
Lead 7439-92-1 0.0300 0.0100 15 5/16/2016
Nickel 7440-02-0 ND 0.0400 15 5/16/2016
Mercury (CVAA) 7439-97-6 ND 0.0002 100 5/18/2016
Zinc 7440-66-6 ND 0.0200 NA 5/16/2016
Hexavalent Chromium 18540-29-9 ND 0.01 2 5/17/2016

ND Indicates Non Detected * Indicates Result is above Acceptable Limits

Cannabis grown with Rx Green Technologies’ nutrient program:

Revised recommended MA heavy metal limits:


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